This guide was originally created for Dr. Brosnan's Oklahoma Environmental History class, Fall 2013. Many of the sources will still be useful to anyone studying the topic.

Lean Library

Lean Library is a browser extension that lets you take the library's online resources with you. If you are searching the general web for resources rather than the library's site, Lean Library will let you know if a resource you are looking at is available through OU libraries, or will directly link you to the ILL page (check out the Don't Buy It, Borrow It page in this guide to learn more about ILLs!). This helps you to avoid paywalls as you browse the web.