title: The effect of locus of control and perceptions of school environment on outcome in three school drug abuse prevention programs.
mesh_terms: D000293:Adolescent; D004777:Environment; D005260:Female; D006266:Health Education; D006801:Humans; D007389:Internal-External Control; D008297:Male; D012574:Schools; D012649:Self Concept; D019966:Substance-Related Disorders / Q000517:prevention & control* / Q000523:psychology