Zeilik, Michael <br/><br/>
Astronomy :  the evolving universe / 
Michael Zeilik 
 - 7th ed. 
<br/><br/> College of Education  Bachelor of Secondary Education major in Science 
<br/><br/><label>ISBN: </label>0-471-59739-2 
<br/><br/><label>Dewey Class. No.: </label>520 Z35