Williamson, John The choice of a pivot for parities. - Princeton, N.J. International Finance Section, Princeton University 1971. - 35 p. 23 cm. - Essays in international finance no. 90 . - Essays in international finance no. 90. . LCCN: 73037628 //r85 Subjects--Topical Terms: Foreign exchange problem LC Class. No.: HG136 HG3821 / .P7 no. 90 Dewey Class. No.: 332 s 332.4/5