Affiliations Courses Research 1941Research AssistantJohns Hopkins University1937[position unknown]State University Of Iowa1939Graduate Teaching AssistantUniversity Of Rochester1946Assistant Professor Of ZoologyIowa State College1947Assistant Professor Of ZoologyIowa State College1948Associate Professor Of ZoologyIowa State College 1937Zoology 1937Student1939Embryology 1939Student1946Embryology 1946Instructor1947Embryology 1947Instructor1948Embryology 1948Instructor 1941[subject unknown]Research Assistants1946[subject unknown]Library Readers1947[subject unknown]Independent Investigators1948[subject unknown]Independent
