Grey literature can simply defined as information produced and distributed outside of commercial publishing channels. It typically excludes journal and book content produced by both commercial and academic publishers. Most but not all of grey literature is available for free.
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Reports Discussion papers, white papers, briefings Guides, manuals, playbooks or technical Conference papers or proceedings Working papers (preprints) Case studies Government reports and data |
Governments at all levels Non-governmental organizations (NGOs) Research centres and institutes Non-profit or charitable organizations Professional or industry organizations Coalitions or special-purpose bodies Think-tanks
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