Sprague, G. F. 1902- Corn and corn improvement / edited by G. F. Sprague. - 2nd ed. - Madison : American Society of Agronomy, 1977. - xvi, 774 p. : ill. ; 24 cm. - Agronomy no. 18 . Includes bibliographies and index. Open access. ISBN: 0891180435 LCCN: 7629528 Subjects--Topical Terms: Corn.Corn--Breeding.