Martin, Will An exact approach for evaluating the benefits from technological change / Will Martin & Julian M. Alston - Washington : World Bank (WB) , 1992 - 31p. : ill. ; 28 cm. - Working papers / World Bank, 1024. . Includes bibliographical references. Subjects--Topical Terms: Technological changeAgricultural development Gov. Doc. Class. No.: UN WB IED WP-1024