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ISSN:1471-6836|31|1|57-75

Oxford University Press‎(2002)‎

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By Barrington J. W.   Fulford S.   Bales G.   Stephenson T. P.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|18|1|61-62

Informa Healthcare‎(1998)‎

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