Nydahl, Theodore, 1902 – 1985. “The Nydahl – Rygh Saga”, Booklet, 1982. SMHC Manuscript Collection 1303, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato.

Nydahl, Theodore, 1902 – 1985. “The Nydahl – Rygh Saga”, Booklet, 1982. SMHC Manuscript Collection 1303, Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato. https://archivesspace.lib.mnsu.edu/public/repositories/4/resources/150 Accessed September 16, 2024.