Rourke's world of science encyclopedia/ 
Freeman, Marcia S. ((Marcia Sheehan),.) 
 -  Rourke Publishing LLC.,  2009 
 - v. 
<br/><br/>
<br/><br/><label>ISBN: </label>1-60044-646-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science -- Encyclopedias, Juvenile.
<br/><br/><label>Dewey Class. No.: </label>R 503 R76 2009