00255nam a2200109Ia 4500082002500000100002000025245004900045260002600094300001500120500000500135700000500140  a330.9033.45bC637.AE  aClifford, James  aAspects of economic development, 1760-1960b  aLondonbLongmanc1967  axii, 315p.  a  a