00317nam a2200121Ia 4500020001500000082002000015100002000035245006200055250001300117260004000130300000900170650001600179  a0333010213  a510.02433 LEW/I  aLewis, Parry, J 0aAn Introduction to Mathematics for Students of Economics   a2 ND ED.  bThe Macmillan CompanyaLondonc1979  a590p  aMathematics