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Original material located at Minnesota State University, Mankato University Archives
Students extracting oil from the machine at Mankato State College 1958-03-13
Mankato State College
People of Minnesota
University Archives and Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato (contributing organization)
Students extracting oil from the machine at Mankato State College 1958-03-13 A441
University Photograph Collection, 1868-ongoing. MSU Archives 309.