| Literature DB >> 5530412 |
E J Salber, J J Feldman, H Offenbacher, S Williams.
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Year: 1970 PMID: 5530412 PMCID: PMC1349287 DOI: 10.2105/ajph.60.12.2273
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572