Shrestha และ Dirgha Raj. (1993) Factors affecting utilization of health center in rural area of Chonburi Province Thailand. Mahidol University,:ม.ป.ท.Shrestha และ Dirgha Raj. 1993. Factors affecting utilization of health center in rural area of Chonburi Province Thailand. ม.ป.ท.:Mahidol University,;Shrestha และ Dirgha Raj. Factors affecting utilization of health center in rural area of Chonburi Province Thailand. ม.ป.ท.:Mahidol University, 1993. Print.