| Literature DB >> 5558849 |
R J Weir, D B Paintin, J J Brown, R Fraser, A F Lever, J I Robertson, J Young.
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Year: 1971 PMID: 5558849 DOI: 10.1111/j.1471-0528.1971.tb00321.x
Source DB: PubMed Journal: J Obstet Gynaecol Br Commonw ISSN: 0022-3204