| Literature DB >> 5466726 |
N H Wiebenga, W K Chang, G R French, R L Woolridge.
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Year: 1970 PMID: 5466726 PMCID: PMC1349075 DOI: 10.2105/ajph.60.9.1806
Source DB: PubMed Journal: Am J Public Health Nations Health ISSN: 0002-9572