Young people encyclopedia 9 

 - USA :   ©1990. 
 - 897 pages :   colored illustrations ;  
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science.<br/>Children's encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>Ref 903  / Y841s 1990 v.9