Grey literature refers to scholarly information that is produced outside of academic institutions. Examples include government reports, institutional reports, newsletters, speeches, urban plans, and so on.
Other "Grey Literature" Sites
Grey literature is work that falls outside of the ordinary publication stream (reports, proceedings, dissertations, preprints).
BASE is one of the world's most voluminous search engines especially for academic web resources. BASE provides more than 140 million documents from more than 6,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access).
Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.
System for Information on Grey Literature in Europe, is your open access to 700.000 bibliographical references of grey literature (paper) produced in Europe.
MetaLib is a federated search engine that searches multiple U.S. Federal government databases, retrieving reports, articles, and citations while providing direct links to selected resources available online.
