Prapant Soontornpagasit และ Aroonsri Mongkolchati. (2015) Factors affecting time to start antenatal care in Mahasarakham province, Thailand. Mahidol University:ม.ป.ท.Prapant Soontornpagasit และ Aroonsri Mongkolchati. 2015. Factors affecting time to start antenatal care in Mahasarakham province, Thailand. ม.ป.ท.:Mahidol University;Prapant Soontornpagasit และ Aroonsri Mongkolchati. Factors affecting time to start antenatal care in Mahasarakham province, Thailand. ม.ป.ท.:Mahidol University, 2015. Print.