%0 Journal Article %A Arthur W. Apter %T Level by level equivalence and the number of normal measures over $P_{\kappa} (\lambda )$ %J Fundamenta Mathematicae %D 2007 %P 253-265 %V 194 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm194-3-3/ %R 10.4064/fm194-3-3 %G en %F 10_4064_fm194_3_3