Am J Public Health Nations Health. 1931 Apr;21(4):430-4. doi: 10.2105/ajph.21.4.430.
American journal of public health and the nation's health
E R Hayhurst, L Greenburg
PMID: 18013246 PMCID: PMC1556408 DOI: 10.2105/ajph.21.4.430
[No abstract available.]