00508n   a2200181 a 4500000002100000001000700021005001700028082001300045100002200058245004200080250000800122260004500130300001500175690001400190908000600204952009900210999001700309B B                 01044520220201175258.0  a330bN96  aLibsey, Richard G  aAn Introduction to Positive Economics  a8th  aOxfordbELBS ( Oxford University )c1996  axxiv,919p.  aEconomics  aG  00104070aSGGSCCbSGGSCCd2020-09-22l0o330 N96p11829r2020-09-22 00:00:00w2020-09-22yBK  c10447d10447