فهرس المقالات among with 360000 statistical population) and 150 youths problem experts (as whole) were selected by cluster sampling method and were given questionnaires. The result of study showed that: First

• حرية الوصول المقاله
  • صفحة الملخص
  • نص كامل
  
  1 - چگونگی و آسیب شناسی اوقات فراغت نوجوانان 12 تا 17 ساله استان لرستان
  حسین مهرداد