“Socioeconomics Factors Associated with the Utilization of Primary Health Services of Mothers and Children at Nunukan District, North Kalimantan”, J Matern Child Health, vol. 2, no. 4, pp. 371–384, Jan. 2018, Accessed: Aug. 21, 2026. Available: https://www.thejmch.com/index.php/thejmch/article/view/74