J L Kelsey, R M Acheson. Show Affiliations »
Abstract
Mesh: See more » Health SurveysMethodsPostal ServiceSurveys and QuestionnairesUnited States
Year: 1971 PMID: 5564963 PMCID: PMC478652 DOI: 10.1136/jech.25.3.177
Source DB: PubMed Journal: Br J Prev Soc Med ISSN: 0007-1242