Suvithayasiri, V., Sripramote, M., & Chredrattanarak, P. (2011). The Relationship of Poor Antenatal Care and Low Birth Weight and Preterm Labor. Vajira Medical Journal : Journal of Urban Medicine, 47(1), 9–16. retrieved from https://he02.tci-thaijo.org/index.php/VMED/article/view/198