The Rancho’s California History Research Library contains more than 3,000 books on California history, both rare volumes and current publications, and also books on decorative arts and museum studies. It is a non-circulating reference center and is cataloged through the Long Beach Public Library. The research library is available by appointment with the historical curator, Sarah Wolk FitzGerald at: email@example.com.
The Archives contain original documents, maps, blueprints, photographs and sound and image recordings directly associated with the Rancho and its owners, occupants and workers. Highlights include the Sarah Bixby Smith Manuscript Collection, Llewellyn Bixby, Jr. Manuscript collection, a series of 1872 stereograph cards of Rancho Los Cerritos by William Godfrey of Los Angeles, photographs of the site from 1872 through the 1940s, and architectural blueprints of the adobe during the 1930 remodel.
The Research Files consist of documents, articles, research notes and photographs collected to support research and further the mission of the museum. Access to these collections is by appointment only with the historical curator.