00351nam a2200157   45000010005000000030003000050050017000080080041000250350018000660350017000840500023001011000023001242450013001472500011001602600022001719534UR20220428183147.0061102|||||||||||||||||||||||||||||||| d  a(janium) 9523  a(janium)9523 4aHB171.5b.S25 19891 aSamuelson, Paul A.10aEconomia  a12a ed  bMcGraw Hillc1989