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Professor T.O. Karl (left) and others

Professor T.O. Karl (left) and another man

Professor T.O. Karl (left) and others with a Northwest Airlines plane

Portrait of J.P. Pflueger. Pflueger was professor of philosophy and religion from 1930 to 1958.

Professor T.O. Karl (left) and another man

A group of men including Professor J.P. Pflueger (back left).