Laju Pertumbuhan Nisbi Visera Total, Hati, Ampela dan Usus Halus Terhadap Bobot Kosong Ayam Broiler Strain Cobb yang dipelihara pada Suhu 30'C dan 20'C (Relative Growth Rate of Total Viscera, Liver, Gizzard and Small Intestine on Empty Body Weight of Cobb Strain Broiler Reared at 30'C and 20'C) - WIRATIH, RETNO (2005)