The Thomas Clark Professional Papers (1950-1998) contain materials from his tenure as a Professor of English at the University of Nevada, Las Vegas (UNLV), which are divided into two series. The gaming research series includes newspaper clippings, correspondence, brochures, bulletins and articles. Also included are book chapters, a glossary of terms used in the casino industry, and gambling guides. In the linguistics and teaching series there are research files, articles, speeches, correspondence, interviews, multimedia, workshops, and conference materials. Also included are files on graffiti, symbolism, ethnic and regional speech differences, language usage, and National Council of Teachers of English (NCTE) material. Additional materials include colleague publications and cassette tapes of interviews from students in courses Clark taught at UNLV.

The Gue Gim Wah Papers (approximately 1940-1985) consist primarily of incoming correspondence (largely written in Chinese) to Gue Gim Wah at the Prince Mine in Pioche, Nevada. Also included are Wah's naturalization certificate, a map of the Prince Mine Bunkhouse, brochure of the Lincoln County Civic Association, and a small amount of photographs including a black-and-white photograph of Gue Gim circa 1940s.