Wilkening, Laurel L. <br/><br/>
Comets 

 - Tucson:  University of Arizona Press  1982 
 - x, 766p. :   il. ;   23cm 
<br/><br/><label>ISBN: </label>0-8165-0769-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cometas