Am J Public Health Nations Health. 1969 Apr;59(4):587-8. doi: 10.2105/ajph.59.4.587-b.
American journal of public health and the nation's health
[No authors listed]
PMID: 18018247 PMCID: PMC1226463 DOI: 10.2105/ajph.59.4.587-b
[No abstract available.]