AMERICAN PHYSICIANS ON STAMPS: MAKERS OF HISTORY. IV.
D005006:Ethnicity; D006664:History; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D008511:Medicine; D010678:Philately; D010820:Physicians; D014481:United States
HISTORY; HISTORY OF MEDICINE, 19TH CENT.; HISTORY OF MEDICINE, 20TH CENT.; PHILATELY; PHYSICIANS