| Literature DB >> 5109311 |
C L Marshall, K M Hassanein, R S Hassanein, C L Marshall.
Abstract
Mesh:
Year: 1971 PMID: 5109311 PMCID: PMC1530222 DOI: 10.2105/ajph.61.8.1556
Source DB: PubMed Journal: Am J Public Health ISSN: 0090-0036 Impact factor: 9.308