ABELL, George.O. <br/><br/>
Exploration of the Universe 

 - 4th Ed 
 - New York  Saunders College Publishing  1982 
 - viii, 721p 
<br/><br/><label>ISBN: </label>0-03-058502-3 
<br/><br/><label>Dewey Class. No.: </label>500