Ritchie, David <br/><br/>
Comets, the swords of heaven 
David Ritchie. 
 - New York  New American Library  c1985. 
 - 234 p.  ill. 
<br/><br/> "A Plume book."  Includes index. 
<br/><br/>Bibliography: p. [225]-227. 
<br/><br/><label>ISBN: </label>0452256194 (pbk.) 
<br/><br/><label>LCCN: </label>84027284  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comets
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Halley's comet
<br/><br/><label>LC Class. No.: </label>QB721  / .R64 1985 
<br/><br/><label>Dewey Class. No.: </label>523.6