“Effects of Maternal Education, Psychosocial Stress, Nutritional Status at Pregnancy, and Family Income, on Birthweight in Nganjuk, East Java”. Journal of Maternal and Child Health 2, no. 4 (July 17, 2017): 324–334. Accessed January 14, 2026. https://www.thejmch.com/index.php/thejmch/article/view/67.