%0 Journal Article %A McCool, James %T The order problem and the power problem for free product sixth-groups %J Glasgow mathematical journal %D 1969 %P 1-9 %V 10 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000458/ %R 10.1017/S0017089500000458 %F 10_1017_S0017089500000458