Schulz, Roy F., 1920 - 2010. Papers, 1950 – 1974. SMHC Collection 1204, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Schulz, Roy F., 1920 - 2010. Papers, 1950 – 1974. SMHC Collection 1204, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/178 Accessed April 19, 2025.