Affiliations Research 1930Dupont FellowUniversity Of Virginia1931Assistant Professor Of ZoologyState University Of Iowa1932Assistant Professor Of ZoologyState University Of Iowa1933[position unknown]State University Of Iowa1934Assistant Professor Of ZoologyState University Of Iowa1939Associate Professor Of ZoologyState University Of Iowa 1930[subject unknown][role unknown]1931[subject unknown]Independent1932[subject unknown]Independent1933[subject unknown]Independent1934[subject unknown]Independent1939[subject unknown]Independent