Hayati RN, Panjono P, Irawan A. Estrous Signs and Progesterone Profile of Ongole Grade Cows Synchronized at Different Ages Fed Different Level of Dietary Crude Protein. Trop. Anim. Sci. J. [Internet]. 2021 Mar. 9 [cited 2025 Dec. 31];44(1):16-23. Available from: https://journal.ipb.ac.id/tasj/article/view/32183