00326nam a2200121 a 450000500170000008200180001710000200003524500530005526000320010830000230014049000270016363000140019020251202164230.0  a330.1543bDOW  aDowling, Edward  aTheory and problems of mathematics for economics  aNew YorkbMcGraw Hillc1980  a407 p.c24 cm.cPB  aSchaums outline series  aEconomics