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Quasisymmetric block designs. (English) Zbl 0251.05009

Combinat. Struct. Appl., Proc. Calgary internat. Conf. combinat. Struct. Appl., Calgary 1969, 111-116 (1970).

MSC:

05B05 Combinatorial aspects of block designs
05Cxx Graph theory
05-02 Research exposition (monographs, survey articles) pertaining to combinatorics