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دليل المستخدم
Abo Joball، H. M.، و Price، R. D. (1978). ANALYSES OF FUTURE MANPOWER NEEDS IN AGRICULTURE AS PERCEIVED BY SELECTED GROUPS OF AGRICULTURALISTS IN THE EASTERN PROVINCE OF SAUDI ARABIA (رسالة ماجستير غير منشورة). Oklahoma State University، ستيلووتر. مسترجع من http://search.mandumah.com/Record/617778
Abo Joball، Hameed Mohammad، و Robert D. Price. "ANALYSES OF FUTURE MANPOWER NEEDS IN AGRICULTURE AS PERCEIVED BY SELECTED GROUPS OF AGRICULTURALISTS IN THE EASTERN PROVINCE OF SAUDI ARABIA" رسالة ماجستير. Oklahoma State University، ستيلووتر، 1978. مسترجع من http://search.mandumah.com/Record/617778