The passing of an era. Dr. John Witzig.
Murdock
Dwight F
DF
D004497:Education, Dental / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D016382:Orthodontic Appliance Design / Q000266:history*; D009967:Orthodontic Appliances / Q000266:history*; D009970:Orthodontics / Q000266:history* / Q000639:trends; D014481:United States