The George Knox Roth Collection (1959-1980) consists of newspaper clippings (including photocopies), magazine articles, newsletters, technical reports and publications, correspondence, notes, and photographs relating to the Atomic Energy Commission, the environmental impact of nuclear testing in Nevada, Nevada mining, Airwest and the Hughes Airport, and other aspects of Howard Hughes’ Nevada operations. The George Knox Roth Collection also includes correspondence and expense reports related to his own company, General Research Consultants.

The Tonopah, Nevada Mining Town Photograph Album (approximately 1908) consists of twenty-two photographs in a leather-bound album. The photographs depict businesses, townspeople, street scenes, and mining operations in Tonopah, Nevada and the surrounding areas of Goldfield, Nevada and Mina, Nevada. Also included are photographs of a fire on May 12, 1908 that destroyed a block of commercial buildings in Tonopah, which were taken by local photographer E. W. Smith., and views of the downtown area both before and after the fire.

The Grace Hayes Photograph Collection consists of black-and-white photographic prints and negatives from approximately 1890 to 1980. The collection includes personal photographs of Hayes and her son Peter Lind Hayes and publicity photographs from Hayes's entertainment career.

The Bob McCaffery Collection on the Save the Hughes Flying Boat Campaign (1980-1983) documents efforts by activists to preserve the plane from destruction and its subsequent acquisition by the Aero Club of Southern California in 1980. The collection contains photographs and newspaper clippings about the Hughes H-4 Hercules flying boat nicknamed the "Spruce Goose" from the 1980s.