Am J Public Health Nations Health. 1933 Sep;23(9):930-4. doi: 10.2105/ajph.23.9.930.
American journal of public health and the nation's health
W P Yant
PMID: 18013824 PMCID: PMC1558354 DOI: 10.2105/ajph.23.9.930
[No abstract available.]