The Elizabeth von Till and Claude N. Warren Professional Papers (1916-2021) are comprised of the personal and professional papers of anthropologist Claude N. Warren and historical preservationist Elizabth von Till Warren. The materials in this collection primarily consist of research files, maps, and drawings on various archaeological and historical preservation projects in southern Nevada of which they both were involved. This collection includes field notes and surveys from archaeological projects such as the Old Las Vegas Mormon Fort and the Las Vegas Springs Preserve. Records on von Till Warren's involvement with the Old Spanish Trail Association, Southern Nevada Historical Society, and historic preservation work around southern Nevada are represented. Also included are Robert H. Crabtree's archaeological research files, a colleague of Claude Warren who bequeathed his professional files to him upon his death.

The MacDonald Ranch Development Records (1972-2010) contain correspondence, maps, land assessments and investigations, master plans, architectural drawings, civil drawings, and landscape drawings primarily detailing the community development process of MacDonald Ranch, one of the oldest master-planned communities in Henderson, Nevada.

The Junior League of Las Vegas Records (1940-2023) contain annual reports, fundraising information, training manuals, articles, minutes, photographs, scrapbooks, cookbooks, and other operational and working files that document the activities of the Junior League of Las Vegas (JLLV). Also included is documentation for advocacy projects the JLLV was involved with, such as Drug Abuse Resistance Education (D.A.R.E.), Safe Haven, the Ronald McDonald House, Read Aloud, and Literature Awareness Program for Children. Other records in this collection document JLLV's fundraising efforts such as the Repeat Boutique, Holiday Coffees, annual benefits, luncheons, and sales of their cookbooks. Also included are scrapbooks and issues of their newsletter The Sage.