.T. ZANZAL AL-SUMMARY, H. (2013). DETERMINATIOM THE OPTIMUM FARM SIZE BY USING THE COST FUNCTION IN THE SHORT AND LONG RUN PERIOD FOR CORN CROP FARMS IN SALAHADAIN PROVINCE SEASON OF 2006. , 9(27), 267-274.
HASSAN .T. ZANZAL AL-SUMMARY. "DETERMINATIOM THE OPTIMUM FARM SIZE BY USING THE COST FUNCTION IN THE SHORT AND LONG RUN PERIOD FOR CORN CROP FARMS IN SALAHADAIN PROVINCE SEASON OF 2006". , 9, 27, 2013, 267-274.
.T. ZANZAL AL-SUMMARY, H. (2013). 'DETERMINATIOM THE OPTIMUM FARM SIZE BY USING THE COST FUNCTION IN THE SHORT AND LONG RUN PERIOD FOR CORN CROP FARMS IN SALAHADAIN PROVINCE SEASON OF 2006', , 9(27), pp. 267-274.
.T. ZANZAL AL-SUMMARY, H. DETERMINATIOM THE OPTIMUM FARM SIZE BY USING THE COST FUNCTION IN THE SHORT AND LONG RUN PERIOD FOR CORN CROP FARMS IN SALAHADAIN PROVINCE SEASON OF 2006. , 2013; 9(27): 267-274.