Evaluation and Development of Drinking Water Supply System (SPAM) IKK Perbaungan Serdang Bedagai Regency. TGEO [Internet]. 2022 Dec. 21 [cited 2026 Mar. 20];11(2):99-110. Available from: https://jurnal.unimed.ac.id/2012/index.php/tgeo/article/view/37354