Kalberg, Harold B., 1906-1991. Oral History Interview, 1 and 7 November 1986. SMHC Manuscript Collection 1494, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Kalberg, Harold B., 1906-1991. Oral History Interview, 1 and 7 November 1986. SMHC Manuscript Collection 1494, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/331 Accessed November 22, 2024.