The Nat Hart Professional Papers contain the business records, personal papers, and photographs of Las Vegas, Nevada chef and restaurateur Nat Hart, who served as the Corporate Vice-President of Food and Beverage for Caesars World in the 1970s and 1980s. Papers date from 1930 to 2000 and include restaurant training and service manuals, business proposals, architectural drawings, recipe cards, cookbooks, menu specifications, photographs, scrapbooks, awards, news releases, and correspondence.

The Harmon Family Papers consist of the political and personal correspondence of Las Vegas, Nevada pioneer Harley A. Harmon from 1910 to 1934, and his son, Harley E. Harmon, from 1950 to 1966. The collection also includes correspondence, personal papers, and photographs of Harley L. Harmon from approximately 1950 to 1999. Also included are family scrapbooks with wedding announcements, photographs, birthday cards, newspaper clippings, and other ephemera.