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SOCIAL SCIENCES 1SS3 - Inquiry in the Social Sciences: This Is(n't) America
“…information produced on all levels of government, academia, business and industry in electronic and print formats not controlled by commercial publishing i.e. where publishing is not the primary activity of the producing body.”
Schnopfel J. (2010, December).Towards a Prague definition of grey literature. Paper presented at: Twelfth International Conference on Grey Literature: Transparency in Grey Literature. Grey Tech Approaches to High Tech Issues, Prague, Czech Republic Available from: http://archivesic.ccsd.cnrs.fr/sic_00581570/document.
It can be used to supplement books and journals when conducting research as it provides a different perspective and is commonly more current than different materials.