B Koschorreck, G Knopp, M Blohmke. Show Affiliations »
Abstract
Mesh: See more » AdolescentAge FactorsGermany, WestHumansMaleSchool Health ServicesSchoolsSmoking/epidemiologySurveys and Questionnaires
Year: 1973 PMID: 4266357
Source DB: PubMed Journal: Offentl Gesundheitswes ISSN: 0029-8573