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		Panjaitan, B., 		Pambudi, R., 		Amansyah, R., 		Akmal, M., & 		Siregar, T.
2020 Dec 30.  Kadar Estrogen Darah dan Tingkat Keasaman (pH) Mukus Serviks Sapi Aceh Memengaruhi Daya Penetrasi Spermatozoa. Jurnal Veteriner. [Online] 21:3