URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/study-of-chemical-composition-and-physical-characteristics-of-pellets-based-on-roughage-feedstuff-dcfcd07e645d245babe887e5e2daa016/8a451ea4-e0a0-11f0-ae8a-e4434b0aa6de