Masry، A. A. H. (1974). Factors of Growth in the Civilization of Southwestern Arabia: An Ethno - Ecological Approach. مجلة كلية الآداب، مج3 ، 41 - 65. مسترجع من http://search.mandumah.com/Record/657602
Masry، Abd Allah H. "Factors of Growth in the Civilization of Southwestern Arabia: An Ethno - Ecological Approach." مجلة كلية الآداب مج3 (1974): 41 - 65. مسترجع من http://search.mandumah.com/Record/657602