Ingvalson, Delbert C, 1923-2008. Oral History Interview, 12 and 14 November 1985. SMHC Manuscript Collection 1498, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Ingvalson, Delbert C, 1923-2008. Oral History Interview, 12 and 14 November 1985. SMHC Manuscript Collection 1498, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/351 Accessed November 14, 2024.