California Ethnic and Multicultural Archives

California Ethnic and Multicultural Archives (CEMA) is an archival institution founded in 1988 that houses collections of primary source documents from the history of minority ethnic groups in California. The documents, which include manuscripts, slide photographs, newspaper clippings, works of art, journals, film, sound recordings, and other ephemera, are housed in the special collections department of the UCSB Libraries at the University of California, Santa Barbara, where they are made accessible to researchers upon request. An effort is currently underway to make certain documents available online through the Online Archive of California.

More information, including a list of collections, on the Wikipedia page.

The website is.