@book{24895,
	author = {Behzad, Mehdi and Chartrand, Gary},
	title = {Graphs and digraphs /},
	publisher = {Prindle, Weber & Schmidt,},
	year = {1979.},
	series = {Prindle weber and Schmidi International Series},
	address = {Boston :},
	note = {Includes Bibliography: p. [383]-401. and index.}
}