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		Widiyono, I., 		Putro, P., 		-, S., 		Astuti, P., & 		Airin, C.
2012 Nov 30.  Kadar Estradiol dan Progesteron Serum, Tampilan Vulva dan Sitologi Apus Vagina Kambing Bligon Selama Siklus Birahi. Jurnal Veteriner. [Online] 12:4