Tinbergen, Jan The appraisal of investment projects : the semi-input-output method / Jan Tinbergen - Rotterdam : Netherlands School of Economics , 1960 - 5 p. : ill. ; 28 cm. - Also 1964. page-12 . Includes bibliographical references and index. Subjects--Topical Terms: Input outputInvestment Dewey Class. No.: 339.23 / TIN