Sayyar، A. A. I.، و Walton، C. M. (1976). EVALUATION OF THE IMPACTS OF MAJOR TRANSPORTATION FACILITIES ON SMALL COMMUNITIES: A DELPHIC APPROACH (رسالة دكتوراه غير منشورة). University of Texas at Austin، أوستن. مسترجع من http://search.mandumah.com/Record/616321
Sayyar، Abd Allah Ibrahim، و C. Michael Walton. "EVALUATION OF THE IMPACTS OF MAJOR TRANSPORTATION FACILITIES ON SMALL COMMUNITIES: A DELPHIC APPROACH" رسالة دكتوراه. University of Texas at Austin، أوستن، 1976. مسترجع من http://search.mandumah.com/Record/616321