Vithaya Kulsomboon. (1989) A study on the relationship between level of drug cooperative activities and knowledge, attitude and behavior of villagers in self medication treatment in Soongnern district, Nakornrajsima. Mahidol University,:ม.ป.ท.Vithaya Kulsomboon. 1989. A study on the relationship between level of drug cooperative activities and knowledge, attitude and behavior of villagers in self medication treatment in Soongnern district, Nakornrajsima. ม.ป.ท.:Mahidol University,;Vithaya Kulsomboon. A study on the relationship between level of drug cooperative activities and knowledge, attitude and behavior of villagers in self medication treatment in Soongnern district, Nakornrajsima. ม.ป.ท.:Mahidol University, 1989. Print.