%0 Journal Article %A Wright, E. M. %T Counting Coloured Graphs. III %J Canadian journal of mathematics %D 1972 %P 82-89 %V 24 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-010-7/ %R 10.4153/CJM-1972-010-7 %F 10_4153_CJM_1972_010_7