Harary, Frank   <br/><br/>
Graph theory   
by Frank Harary; with a foreword and an appendix on the four colour theorem by V. Krishnamurthy 
 - New Delhi  Narosa publishing house  1969 
 - xi, 286 p. 
<br/><br/> includes bibliographical references (pages 249-274) and index 
<br/><br/><label>ISBN: </label>9788185015552   
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph diagrams<br/>Matrices
<br/><br/><label>Dewey Class. No.: </label>512.5  / HAR