00317nam a2200121Ia 4500082002200000100001500022245008400037250000800121260004000129300001600169500000500185700000500190  a338.901bSe474.CT  aSen, A. K.  aChoice of techniques; an aspect of the theory of planned economic developmentb  a3rd  aOxfordbBasil Blackwellc1960, 1968  a122 e113p.  a  a