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15. Alternative positions for childbirth--part II: second stage of labor. Roberts J. J Nurse Midwifery; 1980 Jul; 25(5):13-9. PubMed ID: 6997442 [No Abstract] [Full Text] [Related]
16. [Observation on delivery in an upright position]. Nakamura K. Josanpu Zasshi; 1983 Apr; 37(4):270-1. PubMed ID: 6555260 [No Abstract] [Full Text] [Related]
18. [Childbirth in water: the origin of the childbirth]. Hisa Y. Josanpu Zasshi; 1987 May; 41(5):405-9. PubMed ID: 3648174 [No Abstract] [Full Text] [Related]