00260nam a2200121Ia 4500020001000000082002200010100002200032245002900054260003000083300001500113500000500128700000500133  a36736  a330.0151bL289.ME  aLancaster, Kelvin  aMathematical economicsb  aNew YorkbMacmillanc1968  axiv, 411p.  a  a