Citizen Alert is a Nevada-based environmental organization established in 1975 in response to Yucca Mountain being considered as the repository for the nation's nuclear waste. The records in the collection date from 1971-1999, with the bulk of the records from 1988-1996 and focused on issues of concern to Southern Nevada. The collection includes a large subject and administration file containing the organization’s mailings, fliers and newsletters regarding environmental issues and events, newsletters of other environmental organizations, press releases and brochures from a number of government agencies, and newspaper clippings on specific environmental topics. The collection also contains a number of environmental reports from federal, state, and local agencies as well as a number of conference and activist packets.

The D. Kenneth Richardson Papers on the Hughes Aircraft Company (1950-2011) contains correspondence, speeches, photographs, Hughes Aircraft Company executive meeting notes, and various publications from Hughes Aircraft Company and other aeronautical companies. Also included are published papers written by Richardson and a productivity study published by the Hughes Aircraft Company.

The Helen J. Stewart Papers (1869-1978) document the life of Las Vegas, Nevada pioneer, Helen J. Stewart. It includes correspondence between Stewart and her children as well as various family legal papers and certificates. The collection also contains Helen J. Stewart's 70th birthday scrapbook, a ledger, and a day book from 1904-1919, as well as several photograph albums and information related to the family burial plot.

The Florence Lee Jones Cahlan Photographs depict locations and events in Las Vegas, Nevada from 1909 to 1980. The photographs primarily depict historical locations, including the Las Vegas Mormon Fort, the Kiel Ranch, and plaques commemorating Las Vegas’s 75th anniversary. The photographs also depict celebrations, including the Diamond Jubilee festivities held to celebrate Las Vegas’s 75th anniversary, plaque dedications, building dedications, and the 50th anniversary of the arrival of the first mail planes in Las Vegas. The photographs include the Kennecott Copper Corporation’s facilities in McGill, Nevada, Western Airlines planes and pilots, and Union Pacific Railroad locomotives.

The George Laurence Ullom Photograph Collection (1915-1974) contains photographic prints and negatives created by Las Vegas, Nevada photographer George Laurence "Larry" Ullom. Larry owned and operated Ullom’s Desert Art Studio, which was located in Las Vegas, Nevada. The bulk of the collection consists of Ullom's wedding chapel photography. The collection also includes his photography work for the Bureau of Reclamation, the Agricultural Extension Service, and the Associated Press, Atlantic News, and Acme news bureaus.