Moche, Dinah L.. <br/><br/>
Astronomy: A Self teaching guide /  

 - Second Ed. /  
 - New York 10158 :   John Wiley & Sons, Inc.. 
 - p.284 :  
<br/><br/><label>ISBN: </label>0-471-09713-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>B9  / M1