Idreis، H. M.، و Levenstein، C. (2004). IMPACT OF HARDWARE AND SOFTWARE TECHNOLOGIES ON OCCUPATIO AL HEALTH AND SAFETY IN SAUDI ARABIAN OIL REFINERIES (رسالة دكتوراه غير منشورة). University of Massachusetts Lowell، بوسطن. مسترجع من http://search.mandumah.com/Record/618474
Idreis، Hany M.، و Charles Levenstein. "IMPACT OF HARDWARE AND SOFTWARE TECHNOLOGIES ON OCCUPATIO AL HEALTH AND SAFETY IN SAUDI ARABIAN OIL REFINERIES" رسالة دكتوراه. University of Massachusetts Lowell، بوسطن، 2004. مسترجع من http://search.mandumah.com/Record/618474