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Original material located at Minnesota State University, Mankato University Archives
SMHC Collection 0122. Snarr, Otto Welton, 1886-1966. Collection, 1857-1968.
Minnesota State University, Mankato University Archives
Mankato State Normal School
Mankato State Teachers College
Mankato State College
University Archives and Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato (contributing organization)