00345nam a2200121Ia 4500082002000000100005100020245004200071260004800113300001500161490003700176500000500213700000500218  a339.23bN277.IO  aNational Bureau of Economic Research, New York  aInput output analysis; an appraisalb  aPrincetonbPrinceton University Pressc1955  axii, 371p.  aStudies in income and wealth, 18  a  a