Affiliations Courses Research 1927[position unknown]Swarthmore College1928StudentUniversity Of Pennsylvania1930Assistant InstructorUniversity Of Pennsylvania1932Instructor In ZoologyUniversity Of Pennsylvania1933[position unknown]University Of Pennsylvania1934Instructor In ZoologyUniversity Of Pennsylvania 1927Zoology 1927Student1928Protozoology 1928Student 1930[subject unknown][role unknown]1932[subject unknown]Independent1933[subject unknown]Independent1934[subject unknown]Independent
