%0 Journal Article %A Patty, C. W. %T Homology of Deleted Products of Contractible 2-Dimensional Polyhedra. II %J Canadian journal of mathematics %D 1968 %P 842-854 %V 20 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-081-7/ %R 10.4153/CJM-1968-081-7 %F 10_4153_CJM_1968_081_7