Am J Public Health Nations Health. 1929 Apr;19(4):434-7. doi: 10.2105/ajph.19.4.434.
American journal of public health and the nation's health
E R Hayhurst, L Greenburg
PMID: 18012731 PMCID: PMC1581104 DOI: 10.2105/ajph.19.4.434
[No abstract available.]