- Boolean Tutorial
Colorado State University’s website can teach you some strategies to make your online searches as fruitful as possible.
- Greater Philadelphia GeoHistory Network
This website gathers geographic materials like maps, atlases, city directories, and industrial site surveys documenting historic Philadelphia from the 1600s to today. The Interactive Maps Viewer allows you to view 19th and 20th century maps of the region that document how land use in Philadelphia evolved.
- Prison Museums
The Eastern State staff has assembled a comprehensive list of prison museums from around the globe.