Zulfarniansyah AB, Safitri E. Estrogen Concentration on Friesian Holstein Crossbred with Supplementation Feed Cassava Peel. J. Med. Vet. [Internet]. 2022 Apr. 22 [cited 2024 Aug. 11];5(1):94-7. Available from: https://e-journal.unair.ac.id/JMV/article/view/25309