Rifa’i, Bahtiar Adip, Waluyo Waluyo, and Rachmad Saptono. 2021. “Rancang Bangun Sistem Deteksi Lingkungan Kerja Industri Berbasis GSM ”. Journal of Telecommunication Network (Jurnal Jaringan Telekomunikasi) 11 (2):55-60. https://doi.org/10.33795/jartel.v11i2.45.