URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/effect-of-zinc-oxide-nanoparticle-concentration-coated-on-acrylic-resin-upon-surface-roughness-and-abrasion-resistance-dcfcd07e645d245babe887e5e2daa016/85ddec76-4975-11ef-ae9c-e4434b0aa6de