Am J Public Health Nations Health. 1955 Apr;45(4):502. doi: 10.2105/ajph.45.4.502-a.
American journal of public health and the nation's health
[No authors listed]
PMID: 18017497 PMCID: PMC1624887 DOI: 10.2105/ajph.45.4.502-a
[No abstract available.]