Simon, Seymour <br/><br/>
Look to the Night Sky :  An introduction to Star Watching / 
S. Simon. 
 - Harmondsworth :  Penguin Books,  1979. 
 - 87 p. :  ill. ;  23 cm. 
 - Puffin science books .
<br/><br/>Index, 85-87 
<br/><br/>Appendix, p. 79-84 
<br/><br/><label>ISBN: </label>0140491856 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Աստղագիտություն
<br/><br/><label>Subjects--Index Terms: </label>Planets Stars