Chartrand, Gary. <br/><br/>
Graphs as mathematical models / 
Gary Chartrand. 
 - Boston :  Prindle, Weber & Schmidt,  c1977. 
 - x, 294 p. :  ill. ; 
<br/><br/><label>ISBN: </label>0871502364 
<br/><br/><label>Subjects--Index Terms: </label>Mathematical models 
<br/><br/><label>Universal Decimal Class. No.: </label>519.17  / CHA