Encyclopedia of astronomy :  a comprehensive survey of our solar system, galaxy and beyond / 
consultant editor: Colin Ronan. 
 - London :  Hamlyn,  1979. 
 - 240 p. :  ill. (some col.) ;  31 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>Dewey Class. No.: </label>520