Affiliations Courses Research 1951Assistant Professor Of ZoologyUniversity Of Missouri1952Assistant Professor Of ZoologyUniversity Of Missouri1953Assistant Professor Of ZoologyUniversity Of Missouri1954Assistant Professor Of ZoologyUniversity Of Missouri1938Museum AssistantUniversity Of Pennsylvania1939Harrison Fellow In ZoologyUniversity Of Pennsylvania1947Instructor In ZoologyUniversity Of Pennsylvania 1939Embryology 1939Student1951Embryology 1951Instructor1952Embryology 1952Instructor1953Embryology 1953Instructor1954Embryology 1954Instructor 1938[subject unknown]Beginners1947[subject unknown]Beginners1951[subject unknown]Independent Investigators1953[subject unknown]Independent Investigators1954[subject unknown]Independent Investigators