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دليل المستخدم
Al Dokheal، I. A.، و Wolfe، E. V. (1983). THE RELATIONSHIP BETWEEN MATHEMATICS PROBLEM SOLVING ABILITY AND PIAGETIAN LEVEL OF COGNITIVE DEVELOPMENT IN SIXTH GRADE MALE, SAUDI ARABIAN PUPILS (رسالة دكتوراه غير منشورة). University of Northern Colorado، قريلي. مسترجع من http://search.mandumah.com/Record/614841
Al Dokheal، Ibrahim Ali، و Elaine Vilscek Wolfe. "THE RELATIONSHIP BETWEEN MATHEMATICS PROBLEM SOLVING ABILITY AND PIAGETIAN LEVEL OF COGNITIVE DEVELOPMENT IN SIXTH GRADE MALE, SAUDI ARABIAN PUPILS" رسالة دكتوراه. University of Northern Colorado، قريلي، 1983. مسترجع من http://search.mandumah.com/Record/614841