Combinatorial theory :
an introduction /
Anne Penfold Street, W. D. Wallis.
APA Citation
Street, A. Penfold., Wallis, W. D. (1977). Combinatorial theory: an introduction. Winnipeg: Charles Babbage Research Centre.
MLA Citation
Street, Anne Penfold, and W. D Wallis. Combinatorial Theory: an Introduction. Winnipeg: Charles Babbage Research Centre, 1977.
Warning: These citations may not always be complete (especially for serials).