The Japanese American National Museum holds a wide variety of materials documenting the Japanese American experience from a Japanese American perspective. Built around broad historical eras and themes of Japanese American experience, the holdings are used to fulfill the museum’s mission "to promote understanding and appreciation of America's ethnic and cultural diversity by sharing the Japanese…

The Metropolitan Water District of Southern California manages a library and archival repository documenting the activities of the organization and resources of interest to the greater history of the Los Angeles region. 

The Mojave Desert Archives preserves the history of transcontinental travel to the Los Angeles region through the Mojave Desert of eastern California. Route 66, National Old Trails Road, the Mojave Wagon Road, the Santa Fe Railway (now BNSF), Union Pacific Railroad, and Interstate highways were and are major transit routes through the desert terminating in the Los Angeles basin.