Hardaningtyas E, Mustofa I, Madyawati SP, Rimayanti R, Safitri E, Hermadi HA. Efficacy of Grass and Concentrate Ratio on Milk Urea Nitrogen, Progesterone, and Pregnancy Status in Friesian Holstein. J. Med. Vet. [Internet]. 2022 Oct. 23 [cited 2024 Nov. 22];5(2):207-12. Available from: https://e-journal.unair.ac.id/JMV/article/view/25134