00616nam a2200181 4500 1/13178 980617s1970 enk 001 0 eng d 13631 382 LE Leighton, Richard I. Economics of international trade/ Richard I. Leighton. New York: McGraw-Hill Book Company, 1970. ix, 284 p.: diagr.; 23 cm. Index. Economic. International trade. INST UNIPILB MAIN 20050524 382 LE 00107016 00107016 LOAN 0 2 INST UNIPILB MAIN 20040709 382 LE 00129074 00129074 LOAN 0 1