POLA PEMBERIAN PAKAN DAN PRODUKTIVITAS SAPI POTONG PETERNAK ANGGOTA DAN NON ANGGOTA KELOMPOK TANI TERNAK DI KECAMATAN TANGGUNGHARJO KABUPATEN GROBOGAN (Feeding Pattern and Beef Cattle Productivity the Member and Non Member of Farmer Breeder Group in Tanggungharjo Subdistrict Grobogan Regency) - Oktavia, D (2007)