Wright, Gordon . Tropical agriculture : the development of production / Gordon Wright. - 4th / . - England : English Language Book Society , 1981. - ix, 496p. : Pictures, tables, graphs ; 23cm ` . Includs reference & index ISBN: 0582409012 Ukp. 3.95 Subjects--Index Terms: TROPICAL AGRICULTURE Dewey Class. No.: 634.6 / WRI/T