Louisiana Conference on Combinatorics, Graph Theory, and Computing ; Southeastern Conference on Combinatorics, Graph Theory, and Computing ; Manitoba Conference on Numerical Mathematics and Computing ; Canadian Workshop on the Design and Development of Computer Systems ; British Combinatorial Conference ; Conference on Algebraic Aspects of Combinatorics ; Sundance Conference ; International Conference on ALGOL 68 Implementation, University of Manitoba, 1974 ; West Coast Conference on Combinatorics, Graph Theory, and Computing