Mongkon Donkwa. 1997. Optimum irrigation water allocation in Huai Toey Irrigation Project, Changwat Khon Kaen. Department of Agricultural and resource Economics, Kasetsart University;
Mongkon Donkwa. (1997) Optimum irrigation water allocation in Huai Toey Irrigation Project, Changwat Khon Kaen . Kasetsart University/Bangkok.
Mongkon Donkwa. Optimum irrigation water allocation in Huai Toey Irrigation Project, Changwat Khon Kaen. . Bangkok:Kasetsart University, 1997.
Mongkon Donkwa. (1997) Optimum irrigation water allocation in Huai Toey Irrigation Project, Changwat Khon Kaen . Kasetsart University/Bangkok.