Am J Public Health Nations Health. 1931 Aug;21(8):945-9. doi: 10.2105/ajph.21.8.945.
American journal of public health and the nation's health
E R Hayhurst, L Greenburg
PMID: 18013334 PMCID: PMC1556609 DOI: 10.2105/ajph.21.8.945
[No abstract available.]