Johannes Olsen. Papers, 1885-1959., 1653-1G2-S657, Box: 1 S480-S481-S483-S659-S660-S662-S663-S693-S3272. Southwest Minnesota Historical Center.
Johannes Olsen. Papers, 1885-1959., 1653-1G2-S657, Box: 1 S480-S481-S483-S659-S660-S662-S663-S693-S3272. Southwest Minnesota Historical Center. https://smsu.libraryhost.com/repositories/3/resources/311 Accessed January 10, 2026.