@book{1972-hoffman
,title={{Proceedings of the third Southeastern conference on combinatorics, graph theory, and computing}}
,booktitle={{Proceedings of the third Southeastern conference on combinatorics, graph theory, and computing}}
,editor={Frederick Hoffman and Roy B. Levow and R. S. D. Thomas}
,ISBN={0--919628--06--0}
,MR={48:8247}
,publisher={Utilitas Mathematica}
,address={Winnipeg, Manitoba}
,series={Congressus Numerantium}
,volume={6}
,year={1972}
}