00250nam a2200085Ia 4500008004100000082001400041100003500055245002500090260004900115190826s9999    xx            000 0 und d  a338.5 FER  aFerguson, C. E. | Gould, J. P. 0aMicroeconomic theory  aHomewood, Illinois.bRichard.D. Irwin,c1975