From the Even Cycle Mystery to the L-Matrix Problem and Beyond - M.Sc. thesis by Michael Brundage, 1996.

Graph Theory - overview - Definitions and classical problems

Graph Theory Lessons - A set of Graph Theory lessons that go with the software "Petersen" written by C. Mawata.

Graph Theory Tutorials - This is the home page for a series of short interactive tutorials introducing the basic concepts of graph theory.

Four Color Theorem - History in English and Korean by Lee Yong Kyu.

Graphs Glossary - Simple, short definitions, with cross-references, by Bill Cherowitzo.

Cubic Graphs - Listings of cubic graphs together with a variety of data maintained by Gordon Royle.

Games on Graphs - A MegaMath presentation of basic concepts of graph theory.

Graph Theory Bibliography - Bibliography of Graph Theory at the University of Alberta.

The Four Colour Theorem - MacTutor History of Mathematics topic.