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.

Oral history interview with Dr. William Larkin conducted by Ann Larkin on February 10, 2001 for the Public School Principalship Oral History Project. In this interview, Dr. Larkin reflects upon his career as a middle and high school teacher and administrator in Wisconsin. He discusses different schools and universities that he taught at before becoming a principal, challenges that he faced as a new principal, and life experiences that shaped his approach to education. He describes his experiences working with culturally diverse schools, standardized testing, and school violence, and highlights elements of his training that best prepared him for his career. He also provides his opinion on contemporary topics within the education system, such as curriculum changes, salaries, and school board oversight.