00331nam a2200121Ia 4500082002100000100002400021245005900045260004400104300001900148490003200167500000500199700000500204  a338.901bL525.GX  aLeibenstein, Harvey  aGeneral X-efficiency theory and economic developmentb  aNew YorkbOxford University Pressc1978  ax, 189p. Index  aEconomic development series  a  a