Rungsun Kruekum. 2011. Farmer's participation in sustainable agricultural development in the highland area of the royal project in Chiang Mai preovince. Field of Study Agricultural Extention and Rural Development, Chiang Mai University;
Rungsun Kruekum. (2011) Farmer's participation in sustainable agricultural development in the highland area of the royal project in Chiang Mai preovince . Chiang Mai University/Chiang Mai.
Rungsun Kruekum. Farmer's participation in sustainable agricultural development in the highland area of the royal project in Chiang Mai preovince. . Chiang Mai:Chiang Mai University, 2011.
Rungsun Kruekum. (2011) Farmer's participation in sustainable agricultural development in the highland area of the royal project in Chiang Mai preovince . Chiang Mai University/Chiang Mai.