Kadar Hematokrit, Glukosa, Urea Darah sapi Peranakan Ongole dan Peranakan Friesian Holstein Jantan dengan Pakan Ampas Tahu dan Singkong (Hematokrit Value, Glucose, Urea in Blood of Ongole Crossbred and Friesian Holstein Crossbred Bull Fed with Tofu Weste and Cassava) - RINAYATI, ITA DWI (2005)