This guide is to inform students and researchers on how to systematically search 'Grey Literature' (As opposed to Journals and Databases), especially if they are producing a Qualitative Systematic Review or Scoping Review. Many systematic review protocols recommend searching Grey Literature, although only 42.8% of reviews do so. (Giang, H.T.N. et al. 2019)
|Guidelines and Policies||Low||High if based on good quality evidence from reputable sources|
|Conference Proceedings||High||High if based on current research|
It can be high, but check the source. Possible bias
from industry-led/single-issue organisations
|White Papers||Variable||High, if recent but can be politically driven so may be biased.|
|Name||Help Pages||Subject||Content||Reach||Geo Filters|
|Overton.io||Multidisciplinary||Policy, White Papers, Blogs||Worldwide||Yes. Comprehensive options|
|TRIP Pro||Health||Worldwide||Limited, use LMIC sensitive/specific|
|Policy Commons (Limited to 25x Searches for Free Subscription)||Multidisciplinary||Worldwide|
Subject: Is the resource focused in a single subject, or multiple?
Content: What does it contain?
Reach: Is it worldwide or focused on a specific country?
Geo Filters: Are you able to exclude results from specific geographical areas? (See Decolonising Grey Literature)