Wibowo, Y., Adrianto, D. and P, N.H. 2017. Upgrade Prototype Alat Ukur Pasut Sensor Ultrasonic dengan Perangkat Telemetri Menggunakan Modem GSM: Upgrade Prototype of Ultrasonic Sensor Tidal Meter with Telemetry Device Using GSM Modem. Jurnal Hidropilar. 3, 2 (Dec. 2017), 93–104. DOI:https://doi.org/10.37875/hidropilar.v3i2.82.