00331nam a2200145   45000010005000000030003000050050017000080080041000250350018000660350017000840500023001011000020001242450018001442600023001629451UR20230506195918.0061102|||||||||||||||||||||||||||||||| d  a(janium) 9440  a(janium)9440 4aHB171.5b.C34 19991 aCall, Steven T.10aMicroeconomia  bIberoamericac1999