Affiliations Courses Research 1919StudentUniversity Of Virginia1920[position unknown]University Of Virginia1932Associate ProfessorUniversity Of Pennsylvania1933[position unknown]University Of Pennsylvania1934Associate ProfessorUniversity Of Pennsylvania1935Associate ProfessorUniversity Of Pennsylvania 1919Botany 1919Student 1920Botany[role unknown]1932[subject unknown]Independent1933[subject unknown]Independent1934[subject unknown]Independent1935[subject unknown]Independent
