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دليل المستخدم
Kوeel، A. A. M. (1977). QUANTITATIVE ANALYSIS OF THE ROLE OF PRODUCTIVITY AND WORK HOUR TRENDS IN NATIONAL OUTPUT MAXIMIZATION: A SUGGESED INTERPRETATION. مجلة مصر المعاصرة، مج68, ع370 ، 67 - 85. مسترجع من http://search.mandumah.com/Record/663881
Kوeel، Abd Alfatah Mohammed. "QUANTITATIVE ANALYSIS OF THE ROLE OF PRODUCTIVITY AND WORK HOUR TRENDS IN NATIONAL OUTPUT MAXIMIZATION: A SUGGESED INTERPRETATION." مجلة مصر المعاصرة مج68, ع370 (1977): 67 - 85. مسترجع من http://search.mandumah.com/Record/663881