Grey Literature Defined |
Grey literature is literature produced
by government, academics, business and industry in print and electronic
formats, but which is not controlled by commercial publishers. A widely quoted
definition of grey literature is "literature which is not readily available
through normal book-selling channels, and therefore difficult to identify and
obtain" (Auger, C. P. (1989). Information sources in grey literature.
London: Bowker-Saur.). Grey literature includes theses and dissertations,
conference papers and proceedings, reports (such as white papers, working
papers, internal documentation), government documents, technical notes and
specifications, proposals, datasets/statistics, policies/procedures, patents,
unpublished trial data, regulatory data, speeches, urban plans, test
instruments, pre-prints, company information, social media, and more. A full
list of Document Types in Grey Literature is provided by GreyNet
International.
Grey literature comes from the uncertainty
of the status of this information. However, in cases where there may not be
much information on a topic in peer-reviewed research, grey literature may
prove a very valuable source of information and introduce alternate viewpoints.
Additional benefits to using grey literature include:
- Grey literature can be published much more
quickly since it does not have to be subjected to the lengthy peer-review
process. Results of studies may appear in gray literature 12 to 18 months
before being published via traditional channels.
- Online information from organizations may be
updated more frequently than traditional published journals/books.
- Some grey literature may contain more
depth—for example, a dissertation may include some raw data not published
in a journal article that author goes on to write.
- Grey literature may provide a broader overview of
an issue/topic, such as a white paper or fact sheet.
- Minimizes reporting or publication biases; grey
literature is more likely to include negative results - e.g. clinical
trials.
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Locating Grey Literature |
Grey literature may present a number of challenges
for the researcher, making it difficult to identify and find. Consider the
following when searching for grey literature:
- May not be widely disseminated
- May not be published online or not stable online
(URL/website may change)
- Older documents may not be archived
- Format and citation information may be
inconsistent
- Volume of material may be overwhelming and
consuming
- May not have an international standard book
number (ISBN) or an international standard serial number (ISSN)
- Typically not peer-reviewed and quality
of evidence varies
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Grey Literature Types |
Clinical trials are a form of grey
literature and can inform current research conducted by organizations,
Federal agencies like the National Institutes of Health, academic institutions,
and individual health care providers. These studies investigate the
effectiveness of new treatments, interventions, drugs, procedures, and
devices in order to improve health outcomes for a specific
population.
Several Library databases and online
resources provide access to full-text. A good place to start is
ClinicalTrials.gov
If you are unable to locate the full text
for a particular clinical trial, you may submit an
Interlibrary
Loan request for the material.
A conference proceeding is
the published record of a conference, congress, symposium,
or other meeting sponsored by professional association or society. Proceedings
typically include abstracts or reports of papers presented by the
participants. When the entire text of the papers presented
is included, they are called transactions.
Embase is a library
database that indexes conference proceedings. In the "Advanced" search limit by
"Pub. types". In Web of
Science, after conducting a search, select "Proceedings Papers' and/or
'Meeting Abstracts" under "Document Types".
Previously published dissertations and
theses can be a great source of inspiration for your own
dissertation topic. You can explore the 3 million full-text dissertations
available through ProQuest
Dissertations and Theses.
Government documents are an important primary
source of information on a wide range of issues. Most government documents can
be found through official government websites.
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Catalog
of U.S. Government Publications
Finding tool for federal publications that includes
descriptive information for historical and current publications as well as
direct links to the full document, when available.
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Data.gov
The home of the U.S. Government's open data. Here you
will find data, tools, and resources to conduct research, develop web and
mobile applications, design data visualizations, and more.
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Electronic
Code of Federal Regulations
The codification of the general and permanent rules
published in the Federal Register by the departments and agencies of the
Federal Government produced by the Office of the Federal Register (OFR) and the
Government Publishing Office.
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Federal
Registrar
Official journal of the federal government of the United
States that contains government agency rules, proposed rules, and public
notices.
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govinfo
Provides free public access to official publications
from all three branches of the Federal Government.
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HathiTrust
A collection of U.S. Federal Documents as identified via
the HathiTrust Federal Government Documents Registry.
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MetaLib
Federated search engine that searches multiple U.S.
Federal government databases, retrieving reports, articles, and citations while
providing direct links to selected resources available online.
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Pueblo.GPO.gov
Operated by the U.S. Government Publishing Office Pueblo
Distribution Center (US GPO PDC) to support free federal publication
distribution activities.
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U.S.
Government Bookstore
Allows users to search for and order Government
information products currently available from the Information Dissemination
area of the U.S. Government Publishing Office.
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U.S.
Government Printing Office (GPO)
Keeping America Informed as the official, digital, and
secure source for producing, preserving, and distributing official Federal
Government publications and information products for Congress, Federal
agencies, and the American public.
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USA.gov
USA.gov is the official U.S. portal to federal, state,
local, tribal, and international government information and services.
A preprint is an author's working version of a
research manuscript prior to publication. In most cases, they can be considered
final drafts. Preprints may also be referred to as working papers or
unpublished manuscripts. Preprints have not gone through the
peer-review process, nor have they been improved upon by the publisher (e.g.,
formatting, copy-editing, technical enhancements). It is very important to
critically evaluatereprint publications. Because the peer review process can
take three to six months, preprints are a way to provide valuable research
results and discussion ahead of publication. They are also a great way to
locate information on emerging or rapidly changing research topics.
Preprints are published electronically
and made publicly available on large databases or preprint
repositories. The techniques below describe how to locate preprints in the
Libray and online. Note when searching for preprints in Library databases,
you do not want to select the peer-reviewed journal limiter.
EBSCO Business Source Complete
In
Business
Source Complete, select the Advanced Search screen. Scroll down to
Publication Type and select Working Paper.
ProQuest Central
In
ProQuest Databases, select the Advanced Search screen.
Scroll down to the Source Type limiter and select Working
Papers.
PubMed Central
In PubMed Central, select the
Advanced
Search Builder. Enter the preprint[filter] command along
with your topic keywords.
Web of Science
After conducting a search in
Web of
Science, check the Early Access box under the Quick
Filters on the left-hand side of the screen.
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Advance:
a SAGE preprints community
Allows researchers within the fields of humanities and
social sciences to post their work online and free of charge.
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arXiv
Open access to more than a million e-prints in Physics,
Mathematics, Computer Science, Quantitative Biology, Quantitative Finance and
Statistics.
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Authorea
Browse over 20,000 multi-disciplinary research
preprints.
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bioRxiv
Free online archive and distribution service for
unpublished preprints in the life sciences.
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ChemRxiv
Free submission, distribution, and archive service for
unpublished preprints in chemistry and related areas.
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Figshare
Repository where users can make all of their research
outputs available in a citable, shareable and discoverable manner.
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medRxiv
Free online archive and distribution server for complete
but unpublished manuscripts (preprints) in the medical, clinical, and related
health sciences.
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OSF
Preprints (Open Science Framework)
Free, open platform to support research and enable
collaboration.
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PLOS
Preprints
Nonprofit, Open Access publisher empowering researchers
to accelerate progress in science and medicine by leading a transformation in
research communication.
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Preprints
Preprints is a multidisciplinary preprint platform that
accepts articles from all fields of science and technology.
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PsyArXiv
A free preprint service for the psychological
sciences.
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Research
Square
Research Square is a multidisciplinary preprint and
author services platform.
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Rxivist
Combines biology preprints from bioRxiv and medRxiv with
data from Twitter to help researchers find the papers being discussed in their
field.
Research reports contain the results of
research projects, investigations, and surveys, and are usually published by
the funder or the body undertaking the research. They can be found by searching
the websites of subject associations and research organizations.
For example, after conducting a search in
Discovery,
you can limit your search results to reports by using the "Resouce Type"
limiter on the left-hand side of your results screen.
Social media and other Web 2.0 applications
have become a valuable medium for for experts, governments and academics to
publish new information and analysis outside of the traditional publishing
arrangement. These sites may be useful as a way to disseminate
information/results, follow experts and trending topics, and as a forum for
exchange of ideas.
For a thorough overview of Web 2.0 grey
literature sources, please see the
Grey Literature: Grey 2.0 Guide from New York
University. |
Grey Literature Repositories |
Grey literature repositories are curated collections
of grey literature sources. You can use these collections to search or browse
for resources for use in your research.
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BASE
One of the world's most voluminous search engines
especially for academic web resources. Note: Not exclusively grey
literature.
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CORE
Worldâs largest collection of open access research
papers. Note: Not exclusively grey literature.
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Directory
of Open Access Journals (DOAJ)
Provides full-text, quality controlled scientific and
scholarly, peer-reviewed journals in many subjects and languages. Note: Not
exclusively grey literature.
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Grey
Literature Publishers List
The report is a publication produced by the The New York
Academy of Medicine between 1999 - 2016, alerting readers to new grey
literature publications in health services research and selected urban health
topics.
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Grey
Literature Report
The report is a bimonthly publication of The New York
Academy of Medicine alerting readers to new grey literature publications in
health services research and selected urban health topics.
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GreySource
Provides examples of grey literature and in so doing
profiles organizations responsible for its production and/or processing.
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OAIster
Searches across thousands of libraries and scholarly
websites for open access content. Note: Not exclusively grey literature.
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OpenGrey
Search portal for European grey literature covering
Science, Technology, Biomedical Science, Economics, Social Science and the
Humanities.
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Science.gov
Gateway to U.S. Federal Science. Search over 60
databases and over 2,200 selected websites from 15 federal agencies, for
research and development results.
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Google |
There are a couple of Google custom searches
that narrow your results to a specific type of organizational website. This may
be helpful step when searching for grey literature. Enter your search terms
into these pre-built basic search boxes to see your filtered results.
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NGO
Search
Google Custom Search Engine that searches across
hundreds non-governmental organization (NGO) websites.
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IGO
Search
Google Custom Search Engine that searches across IGO
websites--International governmental organizations made up of more than one
national government. IGO examples include NATO (North Atlantic Treaty
Organization) and the WHO (World Health Organization).
Google allows you to limit your search results
to a particular domain (e.g., .edu, or .gov). This can
be particularly helpful if you are looking for grey literature as you are more
likely to find reliable content from organizations rather than commercial
content.
Look for the "site or domain" box
in Googles Advanced Search options and enter the domain youd like to
search, as shown below.
You can also do this by
adding site:.edu (or .org, .gov, etc) to the end of your search terms
in any Google search box. For example, to find articles
about “ethical leadership” published on government websites,
enter the terms "ethical leadership" site:.gov
Google also allows you to search for results
with a specific file type (example: .pdf, .doc, .ppt, .xls). This is also
helpful when looking for grey literature as government and organizational
reports are more likely to be available as PDF or Word documents. Datasets may
be provided as Excel files.
Look for the "file type" box in Googles
Advanced
Search options and select the file type you would like to search, as shown
below.
You can also do this by
adding filetype:pdf (or .doc, .ppt, .xls, etc.) to the end of your search
terms in any Google search box. For example, to find PDF documents
about “ethical leadership” enter the terms "ethical
leadership" filetype:pdf. |
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