Heyne, E. G. Wheat and wheat improvement - 2ed. - Madison, Wis. : American Society of Agronomy, 1987 - 765 p. : ilus. - Agronomy ; 13 . - Agronomy ; 13 . 59-91 LCCN: 5701 Subjects--Topical Terms: Trigo.Trigo--FisiologĂa y morfologĂa.Trigo--Mejoramiento. Dewey Class. No.: 633.11 / H49 1987