%0 Journal Article
%A W.Wilson Stothers
%T Subgroups of the (2,3,7) Triangle Group.
%J Manuscripta mathematica
%D 1977
%P 323-334
%V 20
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1977__20_154447/
%F MM2_1977__20_154447