00321nam a2200109Ia 4500082002200000100001900022245009800041260004800139300001400187500000500201700000500206  a338.016bSr774.PC  aSraffa, Piero.  aProduction of commodities by means of commodities; prelude to a critique of economic theoryb  aCambridgebCambridge University Pressc1960  axii, 99p.  a  a