Robinson, D. F.  1936- <br/><br/>
Digraphs :  theory and techniques / 
D. F. Robinson, L. R. Foulds. 
 -  Gordon and Breach,  [c1980]. 
 - xv, 256 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography : p. 250-252. 
<br/><br/><label>ISBN: </label>067705470X 
<br/><br/><label>LCCN: </label>79007466  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Directed graphs.
<br/><br/><label>Subjects--Index Terms: </label>გრაფები გრაფების თეორია 
<br/><br/><label>LC Class. No.: </label>QA166.15  / .R62 
<br/><br/><label>Dewey Class. No.: </label>511/.5 
<br/><br/><label>Universal Decimal Class. No.: </label>518.4