URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/failure-analysis-of-platen-superheater-tube--water-wall-tube--and-sealpot-plate--a-case-study-from-electricity-power-plant-in-indonesia-dcfcd07e645d245babe887e5e2daa016/746603dd-891b-11ee-abf0-e4434b0aade8
