00269nam a2200121Ia 4500008004100000100001900041245002800060260001500088300000900103650001300112942000700125999001500132190216s9999||||xx |||||||||||||| ||und||  aAlfred Marshal 0aPrinciples Of Economics  bNullc1961  a731p  aCommerce  cBK  c4672d4672