Gray/Grey Literature Sources

What is grey literature?
Grey (or gray) literature is defined by the Cochrane Handbook for Systematic Reviews of Interventions as "...literature that is not formally published in sources such as books or journal articles." This can include information such as government reports, conference proceedings, graduate dissertations, unpublished clinical trials, and much more.
Grey literature citations in top nursing journals - a bibliometric study
CADTH (Canadian Agency for Drugs and Technologies in Health) Grey Matters
AHRQ (Agency for Healthcare Research & Quality)
CDC (Centers for Disease Control & Prevention)
ClinicalTrials.gov
NTIS (U.S. National Technical Information Service),/a>
Sigma Repository
Advisory Board: Nursing
Google Scholar
Trip Database
MedNar
openmd
Open Grey
Vadlo
World Wide Science

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