[Mental hygiene at polytechnical high schools].
D000293:Adolescent; D002653:Child Behavior Disorders / Q000517:prevention & control; D005859:Germany, East; D006801:Humans; D001523:Mental Disorders / Q000517:prevention & control; D008605:Mental Health Services; D012572:School Health Services
Psychoprophylaxe in der polytechnischen Oberschule.