. A. Hamad,A , , . H . Dabbash,A , and Killidar,Q . ".Evaluating the efficiency of performent method for cooling in poultry fields with Economic Feasifility fishben model between Deserty stated and Electrical fur (A Comparative economic study )", AL-Qadisiyah Journal For Administrative and Economic sciences, 12, 1, 2011, 106-128.