The Howard Hughes Public Relations Reference Files (1931-1997) were compiled by Richard "Dick" Hannah, vice-president of the Los Angeles public relations firm Carl Byoir & Associates, which was hired to direct public relations for Hughes’ companies. The collection is primarily composed of newspaper clippings organized into reference files. A significant number of the files contain articles about Howard Hughes’ personal life, the operations of his companies, and legal and political disputes involving Hughes and his companies. The files also document a range of other subjects related to his business ventures, including aviation, aerospace, defense industries, motion picture studios, film stars, communism in Hollywood, and the House on Un-American Activities Committee (HUAC). Later in life Hughes became obsessed with how he was being portrayed in the media. In addition to collecting magazine articles, newspaper clippings, transcripts, screenplays, and books that referenced him. He also collected newspaper clippings about the activities of print media outlets, columnists, radio-television stations, current and former employees, and competitors. The collection also contains newspaper clippings about Watergate, organized crime, gambling, and Las Vegas and contains press releases, correspondence and records generated by Carl Byoir & Associates as well as Rosemont Enterprise, Inc.

The Red Rock Canyon National Conservation records (1965-2007) contain information about the Red Rock Canyon National Conservation Area (previously the Red Rock Canyon Recreation Lands). It largely consists of newspaper clippings on a variety of events related to Red Rock Canyon from 1965 to 1998 with the bulk from the 1980s and 1990s. The records also include Bureau of Land Management documents pertaining to interpretive efforts, visitation statistics, and law enforcement reports. Also included are the newsletters (1990-1998) and volunteer training manual of the Friends of Red Rock Canyon, a non-profit volunteer organization.