| Literature DB >> 4684068 |
J R Philp, T P Hamilton, T J Albert, R S Stone, C F Pait.
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Year: 1973 PMID: 4684068 DOI: 10.1093/oxfordjournals.aje.a121484
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897