Sustainable agricultural systems : hearings before the Subcommittee on Department Operations, Research, and Foreign Agriculture of the Committee on Agriculture, House of Representatives, Ninety-seventh Congress, second session, April 16, 1982, Ontario, Calif., April 22 and 27, 1982, Washington, D.C

An economic analysis of farms producing grass seed in the Willamette Valley, with special attention to the cultural practice of field burning

Fisher, Douglas Earl, (1972)

Land rotation in Appalachia

Hart, John Fraser, (1977)

Economic analysis of alterative tillage systems for Delaware grain farms

Ohannesian, Judy, (1979)