Abell, George O. <br/><br/>
Realm of the Universe / 
George O. Abell. 
 - 5th ed. 
 - New York :  Saunders College,  1992. 
 - 501 p. 
<br/><br/><label>ISBN: </label>0030749190 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>LC Class. No.: </label>QB45  / .A143