| Literature DB >> 4309897 |
A S Evans, J Casals, E M Opton, E K Borman, L Levine, R R Cuadrado.
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Year: 1969 PMID: 4309897 DOI: 10.1093/oxfordjournals.aje.a121073
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897