%0 Journal Article %A Sherk, F. A. %T Finite Incidence Structures with Orthogonality %J Canadian journal of mathematics %D 1967 %P 1078-1083 %V 19 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-098-9/ %R 10.4153/CJM-1967-098-9 %F 10_4153_CJM_1967_098_9