00256nam a2200109Ia 4500008004000000082001300040100001800053245002900071250000500100260003300105300000800138210210b1974   xxu||||| |||| 00| 0 eng d  a330 CHOP  aCHOPRA (P N).  aPrinciples of economics.  a  aNDbKalyani Publishersc1974  a722