[Prof. R. Hotz on his 65th birthday, May 13, 1970].
D004497:Education, Dental / Q000266:history*; D006665:History of Dentistry; D049673:History, 20th Century; D009970:Orthodontics / Q000193:education*
Prof. Dr. med. R. Hotz zum 65. Geburtstag am 13. Mai 1970.