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Systematic reviews - searching for literature: Grey literature

What is Grey Literature and how to find it?

  • Grey Literature (NHS England's definition) is literature that has not been published or has been published in non-conventional forms. It can include health reports, minutes, data-sets, photographic evidence and trials. It is a way to find very useful to find raw data.
  • Much Grey Literature can be found through search engines such as Google or by going to specific websites.
  • Trials - A journal which encompasses all aspects of the performance and findings of randomized controlled trials in health
  • Grey literature sources (NHS Oxford Health Library Services).
  • The links below offer suggestions for specific institutions which produce Grey Literature.