| Literature DB >> 5465450 |
E Siegel, D Thomas, R Tuthill, E Coulter, S Chipman.
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Year: 1970 PMID: 5465450 PMCID: PMC1349123 DOI: 10.2105/ajph.60.8.1382
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572