00437nam a2200169Ia 4500008004100000020001500041082001700056100001400073245004100087260004800128300000800176650001400184650002000198653001400218653001600232700001900248170901s1973    xx            000 0 und d  a0471077135  a330.18bB57E  aBlack, J. 0aEssential Mathematics for Economists  aChichesterbJohn Wiley And Sons, Inc.c1973  a268  aEconomics  aSocial sciences  aEconomics  aMathematics  aBradley, J. F.