Hilmawan, Hilman, Diah Kusuma Pratiwi, and Agung Mataram. 2022. “Conductor Pipe Casing Welding in Onshore Drilling Rig: Shield Metal Arc Welding”. SIGn Journal of Civil and Architecture 1 (1), 28-32. https://jurnal.penerbitsign.com/index.php/sjca/article/view/153.