The Foreign exchanges : theory, modelling and policy Michael Beenstock ; foreword by John Williamson. - London [etc.] Macmillan 1978. - X, 163 p. 22 cm. Bibliografia. âIndex. ISBN: 0333223691 (cart.) 9780333223697 (cart.) Subjects--Topical Terms: Canvi exterior. LC Class. No.: HG3821 / .B44 1978