KHOLIS, I. KUALIFIKASI WELDING PROCEDURE SPECIFICATION (WPS) DAN JURU LAS (WELDER) BERDASARKAN ASME SECTION IX DI INDUSTRI MIGAS. Swara Patra : Majalah Ilmiah PPSDM Migas, [S. l.], v. 2, n. 3, 2012. Disponível em: http://ejurnal.ppsdmmigas.esdm.go.id/sp/index.php/swarapatra/article/view/81. Acesso em: 3 jul. 2024.