Bates, Andrew D. <br/><br/>
DNA topology 

 - Oxford  OUP  1993 
 - xii, 114p.  PB  24 cm. 
 - In focus .
<br/><br/><label>ISBN: </label>9780199633494 
<br/><br/><label>Dewey Class. No.: </label>572.86  / BAT