%0 Conference Proceedings %T Determining the Economic Value of Water Using Production Functions and Selecting the Optimal Model for Sugar Beet Crop: Case Study of the Gharehghom and Namakzar Basins in Iran %A ابراهیمی سالاری, تقی %A قزل باش, اعظم %J International Conference on Environmental Science and Development (ICESD), Madrid, Spain10 -11, September, 2018 %D 2018