Volume 94, Number 1, November 1991
: Characterization of signed graphs which are cellularly embeddable in no more than one surface.
W. Edwin Clark
: Blocking sets in finite projective spaces and uneven binary codes.
Volume 94, Number 2, November 1991
: On minimum maximal independent sets of a graph.
Sylvia A. Hobart
: On designs related to coherent configurations of type (224).
Y. H. Peng
: On the chromatic uniqueness of certain bipartite graphs.
: The chromatic uniqueness of complete bipartite graphs.
Volume 94, Number 3, November 1991