| Literature DB >> 5764762 |
G J Andersen, G B James, N P Mathers, E L Smith, J Walker.
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Year: 1969 PMID: 5764762 DOI: 10.1111/j.1471-0528.1969.tb09444.x
Source DB: PubMed Journal: J Obstet Gynaecol Br Commonw ISSN: 0022-3204