%0 Journal Article %A Duggal, K. L. %T On the Spheres Carrying an Almost Contingent Structure %J Canadian mathematical bulletin %D 1975 %P 195-201 %V 18 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-039-3/ %R 10.4153/CMB-1975-039-3 %F 10_4153_CMB_1975_039_3