00247nam a2200109 a 4500008004100000050001700041100002200058245002700080250001200107260000900119350000900128120416s1987    xx |||||||||||||| ||    u  aHB 171.5 Gor  aGordon, Sanford D10aIntroductory economics  a6th ed.  c1987  a0.00