Lambda Archives of San Diego is a collection of LGBT historical materials in San Diego, California.
Jess Jessop incorporated the Lesbian and Gay Archives of San Diego in 1987, starting the collection with materials that he and Doug Moore had gathered. Lambda Archives’ primary focus is Lesbian, Gay, Bisexual, and Transgender (LGBT) history and culture in the San Diego County, Tijuana (Baja California Norte, Mexico) Region. Lambda Archives is an all-volunteer, nonprofit 501(c)(3) corporation governed by a volunteer Board of Directors
The website is 
More information on the Wikipedia page