Appell, David <br/><br/>
Comets:   Lazing Visitors from Deep Space 

 - Pleasantville   Reader's Digest Association    2001 
 - 66 p. 
 - Out there .
<br/><br/><label>ISBN: </label>0-7621-0313-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Near--Earth objects<br/> Oort Cloud<br/>Astronomy<br/>Comets
<br/><br/><label>LC Class. No.: </label>QB721.A48