| Literature DB >> 5661538 |
S A Plotkin, J Farquhar, M Katz, A Prinzie, T H Ongalls.
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Year: 1968 PMID： 5661538 DOI： 10.1093/oxfordjournals.aje.a120871
Source DB: PubMed Journal: Am J Epidemiol ISSN： 0002-9262 Impact factor: 4.897