颁布单位：[University of the Free State] |  颁布时间：2003 |  实施时间：2003 |  学科分类：[["Dissertation, (M.A., (Counselling, Psychology))--University, of, the, Free, State,, 2003","Teenagers, --, Mental, health","High, school, student, activities","Academic, achievement, --, Effect, of, student, activities, on","High, school, students, --, Social, conditions","Extracurricular, activities","Psychological, well, being","Sense, of, coherence","Satisfaction, with, life","Socio-economic, status","Black, adolescents","Both, sexes"]]

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