Remembering early anesthesia.
Schwartz
A
A
D000769:Anesthesia, Inhalation / Q000266:history*; D004987:Ethers / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D010678:Philately / Q000266:history*; D012383:Romania
D004987:Ethers