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		Vincensio Simon, M., 		Setiawan, W., & 		Sastra, N.
(2020).
 RANCANG BANGUN SISTEM PERINGATAN DINI BAHAYA AKTIVITAS GUNUNG BERAPI BERBASIS MIKROKONTROLER ARDUINO.
<em>Jurnal SPEKTRUM, 7</em>(3), 42-54.
doi:10.24843/SPEKTRUM.2020.v07.i03.p6