title: Hildanus' specula.
authors.forename: Douglas G
authors.initials: DG
authors.lastname: Hetzler
mesh_terms: D004424:Ear Canal / Q000033:anatomy & histology*; D049670:History, 17th Century; D006801:Humans; D009296:Nasal Cavity; D013525:Surgical Instruments / Q000266:history*