AI Mass، A. M.، و Dوo، W. A. (2003). SUSTAINABLE AGRICULTURAL GROWTH IN THE AL-AHSA OASIS OF SAUDI ARABIA: HARMONIZING WTO GOALS, ENVIRONMENTAL '. CONSTRAINTS, AND NATIONAL FOOD SECURITY ISSUES (رسالة دكتوراه غير منشورة). Indiana State University، تير هوت. مسترجع من http://search.mandumah.com/Record/613042
AI Mass، Ahmad Mohammad، و William A. Dوo. "SUSTAINABLE AGRICULTURAL GROWTH IN THE AL-AHSA OASIS OF SAUDI ARABIA: HARMONIZING WTO GOALS, ENVIRONMENTAL '. CONSTRAINTS, AND NATIONAL FOOD SECURITY ISSUES" رسالة دكتوراه. Indiana State University، تير هوت، 2003. مسترجع من http://search.mandumah.com/Record/613042