| Literature DB >> 5062307 |
T E Walton, F E Brautigam, J A Ferrer, K M Johnson.
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Year: 1972 PMID: 5062307 DOI: 10.1093/oxfordjournals.aje.a121392
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897