PURWADI. PURWARUPA ALAT FILTRASI AIR METODE GRAVITASI DENGAN FILTER SERAT IJUK, PASIR SILIKA, ZEOLIT DAN KARBON AKTIF. Akademi Angkatan Udara Journal of Defense Science and Technology : AAU-JDST, [S. l.], v. 13, n. 1, p. 26–40, 2024. Disponível em: https://journal.aau.ac.id/jdst/article/view/358. Acesso em: 25 sep. 2026.