Fahyra, F., Abd Mujahid Hamdan, and Syafrina Sari Lubis. “ENGOLAHAN IMBAH AIR AHU ENGAN RICKLING ILTER ENGGUNAKAN EDIA IOBALL”. ingkar: ournal of nvironmental ngineering, ol. 3, no. 2, Jan. 2023, pp. 44-57, doi:10.22373/ljee.v3i2.1903.