Columbia subject headings:
Harvard subject headings:
Cytology--Research--Germany--History--20th century.
Erdmann, Rhoda.
Knake, Else.
Research--Germany--History--20th century.
Women cytologists--Germany--Biography.
Women physicians--Germany--Biography.
Princeton subject headings:
Cytology--Research--Germany--History--20th century.
Erdmann, Rhoda.
Knake, Else.
Research--Germany--History--20th century.
Women cytologists--Germany--Biography.
Women physicians--Germany--Biography.