DEKA, K.C., BORGOHAIN, B.N., NATH, K.C., GOSWAMI, J., BISWAS, R.K., & DAS, P.K. (2007). A comparative appraisal of serum progesterone level during oestrous cycle in normal and repeat breeder crossbred cows with ovulatory problem. The Indian Journal of Animal Reproduction, 28(2), 83–85. Retrieved from https://acspublisher.com/journals/index.php/ijar/article/view/5074