%0 Journal Article %A Ezra Brown %A Charles J. Parry %T Class numbers of imaginary qudratic fields having exactly three discriminantal divisors. %J Journal für die reine und angewandte Mathematik %D 1973 %P 31-34 %V 260 %I mathdoc %U http://geodesic.mathdoc.fr/item/JRAM_1973__260_151310/ %F JRAM_1973__260_151310