MARTHA TRACY (1876-1942): EXCEPTIONAL WOMAN OF PUBLIC HEALTH.
D049672:History, 19th Century; D049673:History, 20th Century; D008511:Medicine; D010414:Pennsylvania; D011634:Public Health
BIOGRAPHIES; HISTORY; HISTORY OF MEDICINE, 19TH CENT.; HISTORY OF MEDICINE, 20TH CENT.; PENNSYLVANIA; PUBLIC HEALTH