Hutagaol และ Richard Charles. (1989) Factors influencing the acceptance of tubectomy as a part of birth control methods among villagers in Bangpae district Ratchaburi province Thailand. Mahidol University,:ม.ป.ท.Hutagaol และ Richard Charles. 1989. Factors influencing the acceptance of tubectomy as a part of birth control methods among villagers in Bangpae district Ratchaburi province Thailand. ม.ป.ท.:Mahidol University,;Hutagaol และ Richard Charles. Factors influencing the acceptance of tubectomy as a part of birth control methods among villagers in Bangpae district Ratchaburi province Thailand. ม.ป.ท.:Mahidol University, 1989. Print.