Grant, A M A comparison between pethidine and phenazocine (Narphen) for relief of pain in labour. [electronic resource] - The Journal of obstetrics and gynaecology of the British Commonwealth Sep 1970 - 824-9 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0022-3204 Standard No.: 10.1111/j.1471-0528.1970.tb04408.x doi Subjects--Topical Terms: Anesthesia, ObstetricalAnesthesia, SpinalFemaleHumansInfant, NewbornMeperidine--administration & dosagePhenazocine--administration & dosagePhysical ExaminationPregnancyStatistics as TopicVomiting--chemically induced