[Smoking habits among male secondary-school students].
D000293:Adolescent; D000367:Age Factors; D005860:Germany, West; D006801:Humans; D008297:Male; D012572:School Health Services; D012574:Schools; D012907:Smoking / Q000453:epidemiology*; D011795:Surveys and Questionnaires
Rauchgewohnheiten bei männlichen Haupt-, Real- und Oberschülern.