Konsumsi Protein, Kecernaan Protein dan Retensi Nitrogen Itik Tegal Jantan Umur 1-12 Minggu Akibat Penggunaan Tepung Oncom, Ampas Tahu. (Protein Consumption, Digestibility of Protein and Nitrogen Retention of Male Tegal Duck at 1-12 Weeks Old Fed "Oncom Meal" of Tofii by Product) - OKTIANI, YUPI (2005)