Volume 4, Number 1, December 1988
Alan Rahilly:
Divisions of symmetric designs into two parts.
67-73
Sam Stueckle:
On natural isomorphisms of cycle permutation graphs.
75-85
Masataka Nakamura:
Structural theorems for submodular functions, polymatroids and polymatroid intersections.
257-284
D. G. Rogers:
Irregular, extremal perfect systems of difference sets II.
285-295
Mieko Yamada:
On a series of Hadamard matrices of order 2t and the maximal excess of Hadamard matrices of order 22t.
297-301
Katsuhiro Ota:
The number of contractible edges in 3-connected graphs.
333-354