title: Fifty-nine years ago in Anesthesia & Analgesia. The closed circle method of administration of gas anesthesia. 1930.
authors.forename: B C
authors.initials: BC
authors.lastname: Sword
mesh_terms: D000764:Anesthesia, Closed-Circuit / Q000266:history*; D000769:Anesthesia, Inhalation / Q000266:history*; D049673:History, 20th Century; D014481:United States