Ulfah, N. A., Samik, A., Hariadi, M., Suprayogi, T. W. and Hidanah, S. (2022) “Correlation of parity and age to services per conception, conception rate, and gestation length in Holstein Friesian cross cows”, Ovozoa: Journal of Animal Reproduction, 11(1), pp. 9–14. doi: 10.20473/ovz.v11i1.2022.9-14.