Advances in agronomy : vol. 4 / prepared under the Auspices of the American Society of Agronomy ; edited by A. G. Norman. Advances in agronomy Norman, A. G. ed. Agronomy SB123.57.A38eb vol. 19 630 NOA Includes bibliographical references and index. New York : Academic Press, c1952. c1952. 1952 Text v. : eng License restrictions may limit access.