Leeson, Steven Commercial poultry nutrition / by Steven Leeson and John D. Summer - Ontario, Canada : University Books, 1991 - 283 p. : gráfs. - . LCCN: 164514 Subjects--Topical Terms: Aves de corral--Nutrición Avicultura I. Summer, John D. II.t. Dewey Class. No.: 636.5 L4