The Travelling salesman problem  a guide tour of combinatorial optimization 
edited by E. L. Lawler ...(et al.) 
 - Chichester  John Wiley & Sons  1985 
 - 465 p. ; 25 cm. 
<br/><br/><label>ISBN: </label>0471904139 
<br/><br/><label>LCCN: </label>85-3158 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial optimization<br/>Traveling sales personnel