The otomicroscope and microsurgery 1921-1971.
D049673:History, 20th Century; D007759:Labyrinth Diseases / Q000601:surgery; D008722:Methods; D008866:Microsurgery / Q000266:history*; D010036:Otolaryngology / Q000266:history*; D010040:Otosclerosis / Q000601:surgery