Comets :  readings from Scientific American / 
[compiled by] John C. Brandt. 
 - San Francisco :  W.H. Freeman,  c1981. 
 - xxxi, 92 p. :  ill. 
<br/><br/><label>ISBN: </label>0716713195 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comets.