URL dokumen:
https://prisma.simaster.ugm.ac.id/karya_files/effect-of-dietary-protein-enrichment-with-selenium-on-blood-metabolite-and-pregnancy-rate-of-brahman-crossbred-cows-dcfcd07e645d245babe887e5e2daa016/b1e2cfbc-9f19-11ee-abf0-e4434b0aade8