This collection contains a personal expense notebook kept by Clark S. Thomas, a student at South Dakota State College from 1937 to 1941. The notebook documents his daily expenses—including meals, entertainment, clothing, school supplies, and income—while in college and during his military service in the U.S. Army Air Corps from 1941 to 1945. Also included are receipts for tuition and fees paid between 1937 and 1941.