Polk, Judd. Sterling, its meaning in world finance Judd Polk. - New York Harper 1956. - xvii, 286 p. 23 cm. - International finance . Includes index. ISBN: 0405112459 (ed. 1979) LCCN: 91003945 Subjects--Topical Terms: Sterling zone. LC Class. No.: HG255 / .P57 1956 Dewey Class. No.: 332.4/9171/241