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Abstract
Mesh: See more » Bibliography of MedicineEpidemiologyNational Library of Medicine (U.S.)Periodicals as TopicPreventive Health ServicesUnited States
Year: 1969 PMID: 4974714 PMCID: PMC2031425
Source DB: PubMed Journal: Public Health Rep ISSN: 0094-6214 Impact factor: 2.792