Am J Public Health Nations Health. 1942 Jul;32(7):720-6. doi: 10.2105/ajph.32.7.720.
American journal of public health and the nation's health
A McCown, A Christie
PMID: 18015641 PMCID: PMC1527031 DOI: 10.2105/ajph.32.7.720
[No abstract available.]