Udin, Zaituni, 		Rahim, Ferdinal, 		Hendri, Hendri, AND 		Yellita, Yulia.
" Waktu dan Kemerahan Vulva Saat Inseminasi Buatan Merupakan Faktor Penentu Angka Kebuntingan Sapi di Sumatera Barat (TIME AND REDDISH SIGN OF VULVA DURINGARTIFICIAL INSEMINATION AS A DETERMINANT FACTORS ON CONCEPTION RATE OF COW IN WEST SUMATERA)" <em>Jurnal Veteriner</em> [Online], Volume 17 Number 4 (13 January 2017)