HARRY F. GRAPH THEORY WITH A FORWORDED AN APPENDIX ON THE FOUR COLOR THEREM Textual Documents - 01-01-2001 - NAROSA PUBLISHING HOUSE, NEW DELHI - XI/286 21 X 14 7806 ISBN: PAPER BACK Subjects--Index Terms: DISCRETE STRUCTURES (S.E.) Dewey Class. No.: 006.6 / HAR