Volume 51, Number 1, January 1991
: Edge-disjoint in- and out-branchings in tournaments and related path problems.
: Short-chorded and perfect graphs.
: Disjoint circuits of prescribed homotopies in a graph on a compact surface.
Volume 51, Number 2, March 1991
: Decomposition of graphs on surfaces and a homotopic circulation theorem.
: K-Elimination property for circuits of matroids.
Douglas A. Leonard
: Non-symmetric, metric, cometric association schemes are self-dual.
: A mengerian theorem for infinite graphs with ideal points.
: On nonsymmetric P- and Q-polynomial association schemes.