Nur Kurnia Fibiani and Rini puji astutik (2023) “Sistem Monitoring Kosentrasi Amonia (NH3) Pada Kawasan PT. Petrokimia Gresik Berbasis IoT”, JOURNAL ZETROEM, 5(2), pp. 203 - 205. doi: 10.36526/ztr.v5i2.3142.