Upton, Martin. The economics of tropical farming systems / by Martin Upton.- - Cambridge ; New York : Cambridge University Press, c1996. - xiv, 374 p. : ill. ; 24 cm. - Wye studies in agricultural and rural development . Includes bibliographical references and index. ISBN: 0521482895 (hardback) 0521483409 (pbk.) Source: B-23521 LCCN: 96003040 Subjects--Topical Terms: Agriculture--Economic aspects--Africa.Agriculture--Economic aspects--Tropics. LC Class. No.: HD2117 / .U68 1996 Dewey Class. No.: 338.1/0913