Examples of grey literature include reports, theses, dissertations, official documents, informal communication, research-in-progress, or clinical trials produced by government agencies, academic institutions, or business. Grey literature is not controlled by commercial or academic publishers and is not peer-reviewed.
|CDC Stacks||Collection of CDC publications including guidelines and recommendations and MMWR reports.||N/A|
|Clinicaltrials.gov||ClinicalTrials.gov is a database of privately and publicly funded clinical studies conducted around the world.||2000-present|
A collection of publications and websites in a variety of languages.
|Institutional Repository for Information Sharing (IRIS)||The digital library of the World Health Organization (WHO)s published material and technical information. Its content is freely accessible and searchable in the six official languages (Arabic, Chinese, English, French, Russian & Spanish).||1948-present|
|National Technical Reports Literature (NTRL)||Access to a large collection of historical and current authenticated government technical reports in a wide range of subject areas, including health care, environmental pollution, medicine, biology, and engineering.||1964-present|
|Nexis Uni||Access to news, business, medical, educational and legal sources. The sources include international, national, and regional newspapers; magazines; trade journals; newsletters; wire service reports; and transcripts of television and radio news programs.||1789-present|
|ProQuest Dissertations & Theses||The official digital dissertations archive for the Library of Congress.||1861-present|
|WHO International Clinical Trials Registry Platform (ICTRP)||The main aim of the WHO ICTRP is to facilitate the prospective registration of the WHO Trial Registration Data Set on all clinical trials, and the public accessibility of that information.||N/A|