Robinson, D. F. <br/><br/>
Digraphs :  theory and techniques / 
D. F. Robinson, L. R. Foulds. 
 - New York :  Gordon and Breach,  c1980. 
 - xv, 256 p. :  ill. ; 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Directed graphs.
<br/><br/><label>Subjects--Index Terms: </label>Digraphs. 
<br/><br/><label>Universal Decimal Class. No.: </label>519.17  / ROB