सामान्य निश्चेतना का इतिहास

बाहरी कड़ियाँ 
 Chloroform: The molecular lifesaver An article at University of Bristol providing interesting facts about chloroform.
 Australian & New Zealand College of Anaesthetists Monitoring Standard
 Royal College of Anaesthetists Patient Information page
 Turning the Pages: a virtual reconstruction of Hanaoka's Surgical Casebook, ca. 1825. From the U.S. National Library of Medicine.

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