@book{20417,
	author = {Harris, John M. and Hirst, Jeffry L.},
	title = {Combinatorics and graph theory},
	publisher = {Springer-Verlag,},
	year = {2000},
	series = {Undergraduate texts in Mathematics},
	address = {Berlin:},
	note = {"Purchased under NBHM grant for the year 2000-2001"}
}