E. Ullrey

Copper Requirement oí Baby Pigs Fed Purified Diets12

E. R. Miller, P. K. Ku, K. Keahey, 2011 .

Nutrition of Caged Birds Formulated Diets Versus Seed Mixtures for Psittacines 12 DÃœANE

D. Baer, M. Allen, E. Ullrey, 2006 .