00305nam a2200121Ia 4500008004100000100002000041245003700061260004000098300000900138650001400147942000700161999001500168190216s9999||||xx |||||||||||||| ||und||  aRichard G Lipsy 0aIntroduction To Positive Economy  bEnglish Language Book Societyc1965  a559p  aEconomics  cBK  c9118d9118