00394nam a2200133Ia 4500008004100000041000800041082001600049100005400065245006100119250000600180260004100186300001400227650001900241210716s1958    xx            000 0 und d  aeng  a330.12 DAVR  aDavidson, Ralph K; Smith, Verson L; Wiley, Jay W.  aEconomics: an analytical approach.bAnalytical approach.  a1  aHomewoodbRichard D Irwin, Incc1958  axviii,393  aEconomics(330)