Chldren's Encyclopedia 

 - Czechoslovakia:  Hamlyn Publishing,  1985 
 - 528.p:  Ill;  25.c.m 
<br/><br/><label>ISBN: </label>0600309371 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500  / ham