Affiliations Research 1933[position unknown]Harvard University1931Associate In BiologySchool Of Hygiene And Public Health Johns Hopkins University1932Associate In BiologyJohns Hopkins University1945Research AssociatePrinceton University1946Assistant Professor Of BiologyJohns Hopkins School Of Hygiene 1931[subject unknown]Beginners1932[subject unknown]Independent1933[subject unknown]Independent1945[subject unknown]Independent1946[subject unknown]Library Readers