Affiliations Courses Research 1934Assistant In ZoologyColumbia University1935Assistant In ZoologyColumbia University1936Assistant In ZoologyColumbia University1937Teaching AssistantColumbia University1938Assistant In ZoologyColumbia University 1934Embryology 1934Student1935Protozoology 1935Student 1936[subject unknown]Beginners1937[subject unknown]Independent1938[subject unknown]Independent
