noun
a type of literature that is not formally published in sources such as books or journals, often consisting of reports, theses, conference proceedings, and other materials
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Grey literature refers to research that is not published through traditional commercial or academic channels.
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I found some interesting grey literature on the internet that wasn't in any academic journals.
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I'm always on the lookout for cool grey lit to read online.
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In the vast sea of information, grey literature is like a hidden treasure waiting to be discovered.