URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/physical-and-chemical-quality-of-cow-feces-organic-fertilizer-produced-by-the-addition-of-different-starters-dcfcd07e645d245babe887e5e2daa016/5710559f-cfd4-11ed-97b5-e4434b0aade8