Not a laughing matter.
Saunders
J F
JF
D000766:Anesthesia, Dental / Q000266:history / Q000295:instrumentation; D000769:Anesthesia, Inhalation / Q000266:history / Q000295:instrumentation; D000776:Anesthesiology / Q000266:history; D004203:Disinfection; D004866:Equipment Contamination / Q000517:prevention & control; D049672:History, 19th Century; D006801:Humans; D009609:Nitrous Oxide; D010100:Oxygen
D009609:Nitrous Oxide; D010100:Oxygen