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Grey Literature: General

What is grey literature? How do I find Grey Literature?

General Grey Lit and Report Resources

Center for Research Libraries

The Center for Research Libraries (CRL) is an international consortium of university, college, and independent research libraries. Founded in 1949, CRL supports original research and inspired teaching in the humanities, sciences, and social sciences by preserving and making available to scholars a wealth of rare and uncommon primary source materials from all world regions.

CRL's deep and diverse collections are built by specialists and experts at the major U.S. and Canadian research universities, who work together to identify and preserve unique and uncommon documentation and evidence, and to ensure its long-term integrity and accessibility to researchers in the CRL community.


MedNar is a free, medically-focused deep web search engine that uses Explorit Everywhere!, an advanced search technology by Deep Web Technologies. As an alternative to Google, MedNar accelerates your research with a search of authoritative public and deep web resources, returning the most relevant results to one easily navigable page. Unlike Google, a MedNar search occurs in real-time, retrieving relevant medical information as if you were going to each individual website yourself. Because MedNar is a publicly available search, it can't retrieve results from your subscription or premium medical resources although we are happy to Customize Mednar for Your Organization.

NYAM: Grey Lit Report

NOTE: As of January 2017 NYAM will no longer be updated, but the resources will still be accessible. 

For a catalog/advanced type of search click here!

The report is a publication produced by the New York Academy of Medicine between 1999 - 2016, alerting readers to new grey literature publications in health services research and selected urban health topics.


Records for items in digital libraries, institution repositories.

OAIster is a union catalog of millions of records that represent open access resources. This catalog was built through harvesting from open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). Today, OAIster includes more than 50 million records that represent digital resources from more than 2,000 contributors.

OpenGrey Repository

System for Information on Grey Literature in Europe, is your open access to 700.000 bibliographical references of grey literature (paper) produced in Europe and allows you to export records and locate the documents.

OpenGrey covers Science, Technology, Biomedical Science, Economics, Social Science and Humanities.

Think Tank Search

Think Tank Search

A Google Custom Search of more than 1200 think tanks and research centers.