| Literature DB >> 6066905 |
J D Watkins, T F Williams, D A Martin, M D Hogan, E Anderson.
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Year: 1967 PMID: 6066905 PMCID: PMC1227177 DOI: 10.2105/ajph.57.3.452
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572