Affiliations Research 1949Graduate StudentUniversity Of Pennsylvania1950StudentUniversity Of Pennsylvania1951StudentUniversity Of Pennsylvania1953Associate Professor Of BiologyMorgan State College1954Associate ProfessorMorgan State College1956Professor Of BiologyMorgan State College 1949[subject unknown]Beginners1950[subject unknown]Beginners1951[subject unknown]Beginning Investigators1953[subject unknown]Independent Investigators1954[subject unknown]Independent Investigators1956[subject unknown]Independent