Am J Public Health Nations Health. 1970 Feb;60(2):358. doi: 10.2105/ajph.60.2.358.
American journal of public health and the nation's health
[No authors listed]
PMID: 5460978 PMCID: PMC1350028 DOI: 10.2105/ajph.60.2.358 Free PMC Article
[No abstract available.]