Boettcher, Brian E., 1940-. Oral History Interview, 2007. SMHC Manuscript Collection 1730, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Boettcher, Brian E., 1940-. Oral History Interview, 2007. SMHC Manuscript Collection 1730, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/293 Accessed April 25, 2024.