Combinatorial Mathematics IX [electronic resource] : Proceedings of the Ninth Australian Conference on Combinatorial Mathematics Held at the University of Queensland, Brisbane, Australia, August 24–28, 1981 / edited by Elizabeth J. Billington, Sheila Oates-Williams, Anne Penfold Street.

Star gazing in affine planes -- Orbits, enumeration and colouring -- Classifying distance-transitive graphs -- Some new methods in reconstruction theory -- On the uses of contracted codes -- When are symmetric graphs characterised by their local properties? -- Old and new results on perfect coverings -- The graph of hypergraphic realisations of denumerable multisets of degrees -- Construction of some irreducible designs -- Partitions and the sequence counting problem in economic lot scheduling -- Matroid bases, opposite families and some related algorithms -- An efficient heuristic for identifying a maximum weight planar subgraph -- Constructing certain cubic graphs -- Some decompositions of generalised Catalan numbers -- A corollary to Perfect's theorem -- Factoring binary matrices: A weaver's approach -- A class of natural bijections between catalan families -- A feasibility study of a search for ovals in a projective plane of order 10 -- An interesting decomposition of k4n,4n into planar subgraphs -- Characterizations of different line graphs of graphs -- Some even composite graphs with stability index greater than one -- Fault-free rectangles tiled with rectangular polyominoes -- Some families of partially balanced incomplete block designs -- Directed coverings and packings of pairs and quadruples -- Sequential binary arrays II: Further results on the square grid -- A difference set construction for inversive planes -- On configurations of bear subplanes of the projective plane over a finite field of square order.