Columbia subject headings:
Harvard subject headings:
Autobiographies.
Biographies.
Darwin, Charles, 1809-1882
Darwin, Erasmus, 1731-1802.
Naturalists--England--Biography
Physicians--England--Biography
Princeton subject headings:
Darwin, Charles, 1809-1882.
Darwin, Erasmus, 1731-1802.
Naturalists--England--Biography.
Physicians--England--Biography.