Otto, Arvilla E., 1915-1999. Oral History Interview, 23 April and 3 May 1990. SMHC Manuscript Collection 1430, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Otto, Arvilla E., 1915-1999. Oral History Interview, 23 April and 3 May 1990. SMHC Manuscript Collection 1430, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/588 Accessed April 25, 2024.