00326nam a2200121Ia 4500001000500000005001700005008004100022082001200063100001700075245007600092260002000168650001600188320720261006003703.0120911s9999    xx            000 0 und d  a510 LEW  aLewis, Parry  aAn introduction to mathematics for students of economics / Parry Lewis   aMacmillan & Co.  aMathematics