North, Gerald. <br/><br/>
Mastering astronomy / 
Gerald North. 
 - London :  Macmillan Education,  1988. 
 - xx, 342 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>Dewey Class. No.: </label>520