SISTEM INFORMASI GEOGRAFIS PENYEBARAN COVID-19 DI KABUPATEN ASAHAN MENGGUNAKAN FRAMEWORK CODEIGNITER 4. JOURNAL OF SCIENCE AND SOCIAL RESEARCH, [S. l.], v. 4, n. 3, p. 347–351, 2021. DOI: 10.54314/jssr.v4i3.714. Disponível em: https://jurnal.goretanpena.com/index.php/JSSR/article/view/714.. Acesso em: 4 aug. 2026.