Muliono R. Centralized and Mapped GIS Web-Based Covid-19 Data Reporting Application with The Waterfall Method: (Case Study: Information Communication Department of North Sumatra Province). CNAHPC [Internet]. 2021Feb.6 [cited 2024Nov.8];3(1):30-41. Available from: https://jurnal.itscience.org/index.php/CNAPC/article/view/930