00256nam a2200121Ia 4500082002300000100002000023245002900043250000800072260002800080300001600108500000500124700000500129  a330.0151bAl428.ME  aAllen, R. G. D.  aMathematical economicsb  a2nd  aLondonbMacmillanc1963  axvii, 812p.  a  a