Am J Public Health Nations Health. 1933 Jul;23(7):668-72. doi: 10.2105/ajph.23.7.668.
American journal of public health and the nation's health
M M Cohn
PMID: 18013773 PMCID: PMC1558245 DOI: 10.2105/ajph.23.7.668
[No abstract available.]