Ridpath, Ian. <br/><br/>
Secrets of the sky. 

 - [S.l.] :  Willowisp,  1985. 
 - p. cm. 
<br/><br/><label>ISBN: </label>0874060788 0874060796 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>Dewey Class. No.: </label>520