%0 Journal Article %A Jonsson, W. %T On a Result of A. M. Macbeath on Normal Subgroups of a Fuchsian Group %J Canadian mathematical bulletin %D 1970 %P 15-16 %V 13 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-003-0/ %R 10.4153/CMB-1970-003-0 %F 10_4153_CMB_1970_003_0