Fitrianti, Fitrianti. 2015. “Analisis Kualitas Bonding Cement Di Zona Produktif Sumur BA 147 Menggunakan Ultra Sonic Imager Tool (USIT) Log Di Lapangan BOB PT Bumi Siak Pusako-Pertamina Hulu”. Journal of Earth Energy Engineering 4 (2):29-43. https://doi.org/10.22549/jeee.v4i2.636.