Kravis, Irving B. Comparative prices of nonferrous metals in international trade 1953-64 / Irving B. Kravis, Robert E. Lipsey - New York : NBER, 1966 - viii, 56p. : ill. ; 25 cm. - NBER occasional paper . Includes bibliographical references and index. Subjects--Topical Terms: Natural resourcesPricesNonferrous metalsMinerals Dewey Class. No.: 553.1 / KRA