Alhassan A, Munkaila, and Yussif Bashiru. 2018. “Analysis of Skills Needs in Repair Welding of Low-Alloy, High Tensile Steels Using the Manual Metal Arc Welding (MMAW) Process”. American Scientific Research Journal for Engineering, Technology, and Sciences 47 (1):39-54. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/4338.