SHADRACH RICKETSON--1768-1839: QUAKER HYGIENIST.
D003756:Dental Hygienists; D049671:History, 18th Century; D049672:History, 19th Century; D008511:Medicine; D011315:Preventive Medicine; D033303:Protestantism; D014481:United States
BIOGRAPHIES; HISTORY; HISTORY OF MEDICINE, 18TH CENT.; HISTORY OF MEDICINE, 19TH CENT.; PREVENTIVE MEDICINE; UNITED STATES