The Wilbur and Toni Clark Papers date from 1944 to 1991, with the bulk from 1953 to 1963 and document the lives of Wilbur and Toni Clark in Las Vegas, Nevada and the development of the Desert Inn Hotel and Casino. The collection includes correspondence from Wilbur Clark to those he identified as important individuals including government officials and celebrities. It also includes materials related to Clark’s plan of building luxury apartments near the Desert Inn, and newspaper clippings and scrapbooks about the Clarks and the Desert Inn. The collection contains some audiovisual materials including Wilbur and Toni Clark's home movies, news footage, and film footage of Las Vegas, Nevada and the Desert Inn.

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.