The great ether controversy: a strange interlude in the history of American medicine.
D000769:Anesthesia, Inhalation / Q000266:history*; D005019:Ethyl Ethers / Q000266:history*; D049672:History, 19th Century; D009609:Nitrous Oxide / Q000266:history; D014481:United States
D005019:Ethyl Ethers; D009609:Nitrous Oxide