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 Walking Box Ranch Collection (1880-1979, bulk 1930-1945) contains digital images compiled by the University of Nevada, Las Vegas (UNLV) Public Lands Institute. The collection consists of images of the Walking Box Ranch (Searchlight, Nevada), the Mojave Desert, and the Bell Family, consisting of American film stars Rex Bell, Clara Bow, and their children. There are also candid and professional photographs of Rex Bell and Clara Bow taken at various locations, some of which include friends and other family members, as well as a large number of unidentified film stills from Rex Bell movies. Images in this collection are from Bell family photograph albums and assorted prints, and were reformatted into digital images by the UNLV Public Lands Institute.