Gerritsen, Tess <br/><br/>
Gravity 
/ Tess Gerritsen 
 - New York  : Pocket Books  , c1999. 
 - 342p. 
<br/><br/><label>ISBN: </label>0-671-01678-4 
<br/><br/><label>Dewey Class. No.: </label>FIC GER