Volume 82, Number 1, May 1990
: Edge-hamiltonian property in regular 2- connected graphs.
: Region distributions of graph embeddings and stirling numbers.
: A bijection from ordered trees to binary trees that sends the pruning order to the strahler number.
Volume 82, Number 2, June 1990
Volume 82, Number 3, June 1990
Mark D. Halsey
: Extensions of line-closed combinatorial geometries.
: A combinatorial technique for simplicial complexes and some applications to finite groups.
: On the intersection of two S(3, 4, 2upsilon) having a same derived triple system.
Lewis E. Varga
: Geometric matrices and an inequality for (0, 1)-matrices.
, Yehuda Roditty
: A note on packing trees into complete bipartite graphs and on fishburn's conjecture.
: Enumeration of packed graphs.