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La Roy W. Zell, Mankato State College, 1963-12-03.
Mankato State College
University Archives and Southern Minnesota Historical Center, Memorial Library, Minnesota State University, Mankato (contributing organization)
Professor La Roy W. Zell, the Professor of Biology and Department Head, opening a cage for lab rats at Mankato State College.
10 x 12
University Photograph Collection, 1868-ongoing. MSU Archives 309.