Levy ,David H. <br/><br/>
Comets: Creators and Destroyers / 
David H. Levy. 
 - New York:  Touchstone/Simon & Schuster,  1998. 
 - 256 P. ;  5.5 x 0.6 x 8.5 inches 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Dewey Class. No.: </label>523.6  / LEV