The Stuart and Flora Mason Photographs (1940-1999) contain photographs of hotels, casinos, and other buildings constructed by Taylor International Corporation, which was owned by the Mason Family. The photographs depict the Aladdin, Venetian, Tropicana, Riviera, MGM Grand, and International hotels and casinos in Las Vegas, Nevada. The photographs also depict buildings in Miami and Coral Gables, Florida, and San Juan, Puerto Rico.

The John Wittwer Collection on Agriculture in Nevada (1898-1972) contains the professional papers and records of John Wittwer in his capacity as an Agricultural Extension agent for the University of Nevada from 1921 to 1954. The records are primarily annual reports containing text, photographs, newspaper clippings, and charts that provide a rich chronicle of the conditions of agriculture and ranching in southern Nevada from 1898 to 1972, with the bulk of the material dating from 1929 to 1955. These conditions span water issues, such as flood control and irrigation, to the general difficulties of sustaining agriculture and viable food production in a desert environment. The reports come from the Agricultural Experiment Stations in Clark and Lincoln counties and most contain both a statistical report and a narrative summary.

The Ruby Duncan Photograph Collection on Operation Life (1970s-1980s) is comprised primarily of photographic prints with some corresponding 35 mm negatives of Ruby Duncan and other Operation Life organizers, as well as important organization buildings. Materials include photographs of Ruby Duncan, Aldine Weems, Renee Diamond, and Jack Anderson in the original Operation Life Las Vegas, Nevada Operation Life headquarters and the regional office in San Francisco, California. Also pictured are other employees and beneficiaries of the organization at a Christmas Party.