Siregar, Soribasya Sapi perah : jenis, teknik dan analisa usaha / Soribasya Siregar - Jakarta : Penebar Swadaya, 1992 - 153 p. : ill. ; 22 cm. - Seri peternakan xxx/320/90 . ISBN: 9794890871 Subjects--Topical Terms: Cattle--Feeding and feeds--IndonesiaCattle--BreedingSheep--Feeding and feeds