%0 Journal Article %A Williams, Kenneth S. %T On Two Conjectures of Chowla %J Canadian mathematical bulletin %D 1969 %P 545-565 %V 12 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-072-5/ %R 10.4153/CMB-1969-072-5 %F 10_4153_CMB_1969_072_5