Firdaus Hudaya, Mohammad, Diah Tri Widayati, Budi Prasetyo Widyobroto, and Cuk Tri Noviandi. 2018. “Feed Composition Analysis and Reproductive Status of Dairy Cows Raised in Yogyakart”. International Journal of Engineering and Technology 7 (2.29): 457-59. https://doi.org/10.14419/ijet.v7i2.29.13798.