Tooth key.
Kravetz
Robert E
RE
American College of Gastroenterology.
D003762:Dental Instruments / Q000266:history*; D004867:Equipment Design / Q000266:history; D005602:France; D049671:History, 18th Century; D049672:History, 19th Century; D049690:History, Ancient; D006801:Humans; D014081:Tooth Extraction / Q000266:history* / Q000295:instrumentation*; D014481:United States