| Literature DB >> 4360768 |
G G Caldwell, N J Lindsey, H Wulff, D D Donnelly, F N Bohl.
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Year: 1974 PMID: 4360768 DOI: 10.1093/oxfordjournals.aje.a121607
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897