Nitrous oxide-oxygen analgesia and anaesthesia in normal labor and operative obstetrics . A Monograph Prepared for the Bene-fit OF ALL THOSE CONCERNED IN SaFER AND More Efficient Obstetrics andAnaesthesia % Published by the e/ NATIONAL ANAESTHESIA RESEARCH SOCIETY. J^^

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Keywords: ., bookcentury1900, bookdecade1920, bookidnitrousoxide, bookyear1920