%0 Journal Article %A McCool, James %T Embedding Theorems for Countable Groups %J Canadian journal of mathematics %D 1970 %P 827-835 %V 22 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-093-9/ %R 10.4153/CJM-1970-093-9 %F 10_4153_CJM_1970_093_9