D. J. A. Welsh <br/><br/>
Complexity : knots, colourings and counting 

 -  Cambridge University Press,   1993 
 - viii, 163p. 
 - London mathematical society lecture note series, 186 .
<br/><br/> SAR/09/2009/20-04-09 
<br/><br/><label>ISBN: </label>9780521457408 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computational complexity <br/>Knot theory <br/>Combinatorial analysis
<br/><br/><label>Dewey Class. No.: </label>514.2242 WEL(COM)