%0 Journal Article %A Elder, G. Griffith %T Galois Module Structure of Ambiguous Ideals in Biquadratic Extensions %J Canadian journal of mathematics %D 1998 %P 1007-1047 %V 50 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-050-4/ %R 10.4153/CJM-1998-050-4 %F 10_4153_CJM_1998_050_4