Whipple, Fred Lawrence,    1906- <br/><br/>
The Mystery of comets /    
Fred L. Whipple; assisted by Daniel W. E. Green 
 - Cambridge:   Cambridge University Press,   c1985 
 - xii, 276 p.:    ill.;    24 cm 
 - Smithsonian Library of the solar system   .
<br/><br/>Includes bibliographical references (p. 266-267) and index 
<br/><br/><label>ISBN: </label>0521324408 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comets--------
<br/><br/><label>Dewey Class. No.: </label>523.6