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Abstract
Mesh: See more » Public HealthSocieties, MedicalUnited States
Year: 1971 PMID: 5539843 PMCID: PMC1530620 DOI: 10.2105/ajph.61.1.162
Source DB: PubMed Journal: Am J Public Health ISSN: 0090-0036 Impact factor: 9.308