Eicher, David J. <br/><br/>
COMETS! :  Visitors from Deep Space / 
David J. Eicher ; foreword by David H. Levy. 
 - Cambridge :  Cambridge University Press,  2013. 
 - 1 online resource (230 pages) 
<br/><br/><label>ISBN: </label>9781107045255 (ebook) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comets