Panuphan Prapatigul. 2011. Dairy cooperative's management process contributing to occupation development of dairy farmers in upper northern Thailand. Field of Study Agricultural Extension and Rural Development, Chiang Mai University;
Panuphan Prapatigul. (2011) Dairy cooperative's management process contributing to occupation development of dairy farmers in upper northern Thailand . Chiang Mai University/Chiang Mai.
Panuphan Prapatigul. Dairy cooperative's management process contributing to occupation development of dairy farmers in upper northern Thailand. . Chiang Mai:Chiang Mai University, 2011.
Panuphan Prapatigul. (2011) Dairy cooperative's management process contributing to occupation development of dairy farmers in upper northern Thailand . Chiang Mai University/Chiang Mai.