Heady, Earl Orel, 1916- Farm management economics, by Earl O. Heady and Harald R. Jensen. - 645 pages: illustrations; 24 cm. LCCN: 54009413 Nat. Bib. No.: GB56-12849 Subjects--Topical Terms: Farm management. LC Class. No.: S561 / .H4 Dewey Class. No.: 634.999