00308nam a2200109Ia 4500082002400000100006400024245005100088260003500139300001400174500000500188700000500193  a339.230212bUn58.PI  aUnited Nations. Economic and Social Affairs, Department of-  aProblems of input-output tables and analysisb  aNew YorkbUnited Nationsc1966  aiv, 157p.  a  a