Walton, L. E. Foreign trade and foreign exchange : their theory and practice / L. E. Walton. - London : Macdonald & Evans, 1957. - 285 p. : ill. ; 21 cm. Includes Index. 336 336 LCCN: 93908359 Subjects--Topical Terms: Foreign trade. Dewey Class. No.: 332.45 / W176f