00363nam a2200109Ia 4500008004100000020001500041050002500056100003100081245007100112260004600183300002400229150223s9999    xx            000 0 und d  a9710864890  aHB 171.5b.G993 2004  aGuzman, Juliet S. et. al.   aMastering the principles of Economics /cJuliet S. Guzaman et. al.  aPhilippines :bNational Book Store,c2004  a123 pages :c22 cm.