A W Hedrich1. Show Affiliations » 1. School of Hygiene and Public Health, The Johns Hopkins University, Baltimore, Maryland.
Abstract
Year: 1927 PMID: 18012213 PMCID: PMC1321692 DOI: 10.2105/ajph.17.7.691
Source DB: PubMed Journal: Am J Public Health (N Y) ISSN: 0271-4353