It can be hard to find reports, conference proceedings, clinical trials, & other resources that are usually not available in databases, but these resources can be an important part of your research, especially to protect against reporting bias in the published literature. The Grey Literature research guide provides links to these sources & tips on how to search them. Resources that you'll find include ASPR TRACIE Technical Resources (DHHS) for disaster preparedness info; Climate Change & Human Health; Homeland Security Digital Library (DHS); & Health & Environmental Research Online (HERO; EPA).