Maule, David,  <br/><br/>
The double Helix 

 - iv, 106 pages :   illustrations ;   20 cm 
<br/><br/> Level 6 
<br/><br/><label>ISBN: </label>0582451817 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Readers - Fiction
<br/><br/><label>Dewey Class. No.: </label>428.6