World book encyclopedia of science 

 - Chicago:   World book Inc.,  1975 
 - 436p. 
<br/><br/>Volume 8,1975 
<br/><br/><label>ISBN: </label>0-7166-0075-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World
<br/><br/><label>Subjects--Index Terms: </label>Planet  
<br/><br/><label>Universal Decimal Class. No.: </label>R 030.1  / K4;L5.8