title: The Minnitt Gas/Air Apparatus (Queen Charlotte model).
authors.forename: R
authors.initials: R
authors.lastname: Westhorpe
mesh_terms: D016362:Analgesia, Obstetrical / Q000266:history* / Q000295:instrumentation; D016058:Analgesia, Patient-Controlled / Q000266:history* / Q000295:instrumentation; D004739:England; D049673:History, 20th Century; D006801:Humans