Quisenberry, Karl S. Wheat and wheat improvement - Madison, Wis. : American Society of Agronomy, 1973 (c.1967) - 560 p. : ilus. - Agronomy ; 13 . - Agronomy ; 13 . LCCN: 38132 Subjects--Topical Terms: Trigo.Trigo--Mejoramiento. Dewey Class. No.: 633.11 / Q85