Description: Papers of Ralph C. Hahn (B.S. Civil Engineering '51), including parts 1 and 2 of Hahn's memoir about his family, growing up during the Great Depression, his time as a student at the University of Illinois, career as an engineer, and election to the University of Illinois Board of Trustees (1966). Also includes a reprint from the IEEE Transactions on Education (May 1971) of Hahn's article "The Engineering Educator's Responsibility," a biography of Amanda Louisa Crane Hahn, and a history of the Hahn family.