W H Frost1. Show Affiliations » 1. Johns Hopkins University School of Hygiene and Public Health.
Abstract
Year: 1925 PMID: 18011511 PMCID: PMC1320534 DOI: 10.2105/ajph.15.5.394
Source DB: PubMed Journal: Am J Public Health (N Y) ISSN: 0271-4353