Am J Public Health Nations Health. 1930 Mar;20(3):320-5. doi: 10.2105/ajph.20.3.320.
American journal of public health and the nation's health
E R Hayhurst, L Greenburg
PMID: 18012979 PMCID: PMC1555762 DOI: 10.2105/ajph.20.3.320
[No abstract available.]