The Clark County, Nevada United States Bicentennial collection dates from approximately 1970 to 1976. The collection documents Nevada's participation in the 1976 Bicentennial celebration of the American Revolution, as well as celebrations from other states and countries in Europe. The collection is comprised of official reports from the U.S. Bicentennial committee, scrapbooks from the Clark County bicentennial committee, newspapers, and event programs from bicentennial celebrations around the country. The collection also contains a film of various American states' bicentennial celebrations.

The Zelvin Lowman Papers (1938-2001) contain the papers of Assemblyman Zelvin "Zel" Lowman who served in the Nevada State Legislature from 1967 to 1977. Included are court records, publications, correspondence, reports, and newspaper clippings pertaining to his time in office. Subjects include the Clark County School District, school busing, water and air quality issues, capital punishment, medical malpractice, mental health legislation, and the Equal Rights Amendment (ERA). The 2018 addition includes newspaper clippings, awards, citations, school records, photographs, occasional cards, invitations, and extensive material on the Lowman's involvement with the Boy Scouts and Girl Scouts of America. Also included are books written by Zel Lowman about scouting and the Presbyterian Church.