The Southern Nevada Historical Society Photograph Collection on Basic Magnesium, Inc. contains photographs of the construction of Basic Magnesium Inc.'s plants and buildings from 1941 to 1942. The photographs primarily depict aerial views of the plant site and various buildings, including the administration building, tent camp, chlorination buildings, electrolysis facilities, electrical distribution systems, and warehouses. The photographs also depict Lake Mead and the early buildings in Henderson, Nevada.

The Hank Castro Music Business Records document Hank Castro's career in the music industry in Las Vegas, Nevada from 1969 to 1990. The bulk of the collection consists of original audio recordings from the Las Vegas Recording Studio. The collection also contains legal documents, personal correspondence, and promotional material related to the Las Vegas Recording Studio (1971-1985), songwriter agreements, and sheet music (the majority of the lyrics written by Hank Castro) from artists represented by the Las Vegas Recording Studio and Castro's other companies.