title: J.J. Groen, 1912-1973.
mesh_terms: D006309:Hearing; D049673:History, 20th Century; D006801:Humans; D009426:Netherlands; D010036:Otolaryngology / Q000266:history; D010825:Physics / Q000266:history; D014722:Vestibule, Labyrinth / Q000502:physiology