Protheroe, W. M. <br/><br/>
Exploring the universe / 
W.M. Protheroe, E.R. Capriotti, G.H. Newsom. 
 - 4th ed. 
 - Columbus, Ohio :  Merrill Pub. Co.,  c1989. 
 - 665 p. 
<br/><br/><label>ISBN: </label>067520898X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy
<br/><br/><label>Subjects--Index Terms: </label>Thiên văn học 
<br/><br/><label>Dewey Class. No.: </label>520  / PRO 1989