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Grey Literature

Tips and Sources for Finding Grey Literature

Where to look for grey literature depends on the specific topic you're researching.  Here are some examples of places to look and things to look for:

  • Medical and health science information:
    • Embase and other literature databases that include conference proceedings
    • Centers for Disease Control & Prevention website
    • List of grey-literature producing organizations from the New York Academy of Medicine's Grey Literature Report
    • Harvard's Kennedy School "Think Tank" search engine (searches more than 1,200 think tanks and research centers)
    • Google's Advanced Search, which can be filtered for domain types (.edu, .gov, .org, etc.) and file types (.pdf, .ppt, etc.)
    •, which lists clinical trials in the United States
    • EU Clinical Trials Register, which lists clinical trials in the European Union
    • MedWatch, the U.S. Food & Drug Administration's product safety reporting program for health professionals, patients and consumers
  • Drug, medicine, and pharmaceutical information:
    • Pharmaceutical companies' websites (brochures, fact sheets, drug package inserts, etc.)
    • NIH U.S. National Library of Medicine Drug Information Portal
    • Drugs@FDA, a searchable database of the U.S. Food & Drug Administration drug approval documents
    • DailyMed, a website with more than 125,000 listings as submitted to the U.S. Food & Drug Administration
  • Medical device information:
  • Dietary supplement information: