Volume 4, Number 1, December 1988
: Divisions of symmetric designs into two parts.
: On natural isomorphisms of cycle permutation graphs.
: Structural theorems for submodular functions, polymatroids and polymatroid intersections.
D. G. Rogers
: Irregular, extremal perfect systems of difference sets II.
: On a series of Hadamard matrices of order 2t and the maximal excess of Hadamard matrices of order 22t.
: The number of contractible edges in 3-connected graphs.