00404nam a2200157Ia 4500008004100000020001800041082001500059100002000074245001400094260004600108300000800154546000900162650005300171942000700224999001500231230312s9999||||xx |||||||||||||| ||und||  a0-673-47429-1  a330bBYR-E  aByrns Ralph, T. 0aEconomics  bScott, Foresman and CompanyaLondonc1989  a846  aEng.  aEconomicsvEconomic Problem, Economic Efficiency  cBK  c2463d2463