“…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. Towards a Prague definition of grey literature. Presented at: Twelfth International Conference on Grey Literature: Transparency in Grey Literature. Grey Tech Approaches to High Tech Issues. Prague, 6-7 Dec 2010, Czech Republic. pp.11-26. Available from: http://archivesic.ccsd.cnrs.fr/sic_00581570/document
In the health sciences, grey literature is crucial in completing the picture of research on a particular topic. Grey literature can be an important source for:
How is grey literature different than traditional published literature?
Finding grey literature can often be a daunting task. If you are having trouble figuring out who might be producing the information you are interested in, the below links will provide information on a number of organizations that produce grey literature.