Am J Public Health Nations Health. 1928 Apr;18(4):503-6. doi: 10.2105/ajph.18.4.503.
American journal of public health and the nation's health
E R Hayhurst, L Greenburg
PMID: 18012456 PMCID: PMC1580696 DOI: 10.2105/ajph.18.4.503
[No abstract available.]