%0 Journal Article %A Best, L. A. %T Subgroups of One-Relator Fuchsian Groups %J Canadian journal of mathematics %D 1973 %P 888-891 %V 25 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-093-5/ %R 10.4153/CJM-1973-093-5 %F 10_4153_CJM_1973_093_5