Shararah، H. H.، و Hixm، C. M. (1975). HOW ACCIDENT, INSURANCE, SAFETY, AND CONTROL OF LOSS TIME ARE IMPORTANT FACTORS TO SUCCESSFUL CONSTRUCTION MANAGEMEN (رسالة ماجستير غير منشورة). University of Houston، هيوستن. مسترجع من http://search.mandumah.com/Record/619451
Shararah، Hussein Hamzah، و Charles M. Hixm. "HOW ACCIDENT, INSURANCE, SAFETY, AND CONTROL OF LOSS TIME ARE IMPORTANT FACTORS TO SUCCESSFUL CONSTRUCTION MANAGEMEN" رسالة ماجستير. University of Houston، هيوستن، 1975. مسترجع من http://search.mandumah.com/Record/619451