Doctors afield. Alexander Graham Bell, doctor of medicine.
D001299:Audiometry / Q000266:history / Q000295:instrumentation; D003142:Communication; D004568:Electrodiagnosis / Q000266:history; D005197:Famous Persons; D049672:History, 19th Century; D049673:History, 20th Century; D011878:Radiotherapy / Q000266:history; D012606:Scotland; D013679:Technology, Radiologic / Q000266:history; D013689:Telephone; D014481:United States