00354nam a2200145   45000010005000000030003000050050017000080080041000250350018000660350017000840500021001011000023001222450040001452600023001859419UR20220428183119.0061102|||||||||||||||||||||||||||||||| d  a(janium) 9408  a(janium)9408 4aHB171b.L56 19731 aLipsey, Richard G.10aIntroduccion a la economia positiva  bVicens Vivesc1973