A collection of essays and valuable information regarding gays and lesbians across history. There are two sections dedicated to primary documents, Homosexuality in Eighteenth-Century England and Homosexuality in Nineteenth-Century England.
The largest repository of Lesbian, Gay, Bisexual, Transgender and Queer materials in the world. They even have a digital collection.
Brown University has put together a reading list of different theory texts. They also have lists of Gender, Sexuality, and Feminist Studies Journals, Libraries, Archives, and Museums, and Fiction and Films that will be helpful for anyone looking for a place to start with any of these subjects.
The Library of Congress has a growing collection of zines. The Zine Web Archive was created to supplement the physical zine collection. Collection priorities include zines by people of color, women, immigrants, and LGBTQ+ and transgender and gender non-conforming individuals and organizations.