\bib{1972/hoffman}
\yr 1972
\isbn 0--919628--06--0
\mr 48:8247
\editor Frederick Hoffman
\editor Roy B. Levow
\editor R. S. D. Thomas
\book Proceedings of the third Southeastern conference on combinatorics, graph theory, and computing
\series Congressus Numerantium
\seriesvol 6
\publ Utilitas Mathematica
\publaddr Winnipeg, Manitoba
\endref