ONE National Gay and Lesbian Archives
This organization purports to be the world's largest research library on Gay, Lesbian, Bisexual,and Transgendered heritage and concerns.
There is an online catalog for easy searching of the archive's collection, which includes books, audio, video, magazines and journals, and files and archives. There are links to the LGBT History Timeline, which covers on LGBT rights and history from 1940 on, with a focus on southern California; and the Twice Blessed Collection, which focuses on Jewish GLBT materials.