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Grey Literature

Grey literature is any literature that is not published in the traditional sense. Grey literature is not easily found. It is often excluded from large databases and other mainstream sources. Use grey literature to complement your search.

There are many types of grey literature ranging from scholarly sources to more community-based resources. Examples of grey literature include:

  • Government documents, theses, annual reports, conference proceedings.
  • Websites of associations or professional organizations, newsletters, and blogs.

Other Resources


Trip is a clinical search engine designed to allow users to find research evidence to support their practice and/or care.