Abo Alkhair، Y. M. S. (1985). The Utility of Factor Analysis and Pearson Product Moment Correlation in Depicing the Geomorphic Characteristics of Alluvial Fans in Death Valley U.A.S. مجلة كلية الآداب، مج12, ع2 ، 203 - 220. مسترجع من http://search.mandumah.com/Record/660585
Abo Alkhair، Yahya Mohammed Sheikh. "The Utility of Factor Analysis and Pearson Product Moment Correlation in Depicing the Geomorphic Characteristics of Alluvial Fans in Death Valley U.A.S." مجلة كلية الآداب مج12, ع2 (1985): 203 - 220. مسترجع من http://search.mandumah.com/Record/660585