The resources on this page provide a general starting point to searching for grey literature. Here you will find links to resources that specifically collect and index grey literature documents. The search engines found on this page have been designed to conduct broad searches across global databases, including the deep web. The preformulated search strategies have been designed to filter for specific types of grey literature such as non-governmental documents.
These resources broadly collect and index grey literature such as white papers, policy documents, summaries and more on global health topics. The first two resources are the most commonly searched. Additional resources are grouped geographically (American, European).
The resources below contain lists of the many databases that can be searched for grey literature.
The search engines below function similarly to Google, but contain features and filters useful for retrieving globally dispersed grey literature documents. These resources are organized first by broadest global perspective, and then by range of topic coverage from broadest to narrowest.
Google databases and preformulated search engines.
PubMed databases, features, and preformulated search strategies.
These resources can be used to get in contact with researchers or to search for unpublished study information.