00424nam a2200133   4500008004100000020001800041050002200059100002800081245006800109250001200177260004300189300003800232700002000270150921b        xxu||||| |||| 00| 0 eng d  a9780471679461  aHB 171.5.W45 2007  aWelch, Patrick J.d2007  aEconomics: Theory & practicecPatrick J.Welch and Gerry F.Welch  a8th ed.  aNew Jersey,bJohn Wiley & Sons,c2007.  axx,532 p. : ill.bIncludes index.  aWelch, Gerry F.