Thaweporn Ounachak. 1990. The pattern of health services utilization among the Karen hill tribes. Bangkok:Chulalongkorn University;
Thaweporn Ounachak. (1990) The pattern of health services utilization among the Karen hill tribes (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Thaweporn Ounachak. The pattern of health services utilization among the Karen hill tribes. Bangkok:Chulalongkorn University, 1990.
Thaweporn Ounachak. (1990) The pattern of health services utilization among the Karen hill tribes (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.