Luening, R. A. The farm management handbook / by Robert A. Luening and William P. Mortenson. - 6th ed. - Danville, Ill. : Interstate Printers & Publishers, c1979. - xiv, 513 p. : ill. ISBN: 0813420822 Subjects--Topical Terms: Farm management.Farm management--United States. LC Class. No.: S561 / .L83 1979 Dewey Class. No.: 630/.68