%0 Journal Article
%A Park, Ralph
%T Topics in Direct Differential Geometry
%J Canadian journal of mathematics
%D 1972
%P 98-148
%V 24
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-012-1/
%R 10.4153/CJM-1972-012-1
%F 10_4153_CJM_1972_012_1