Macmillan encyclopedia of science ; The Enviroment 

 - 96 pages :   colour illustrations ;   28 cm 
<br/><br/><label>ISBN: </label>0029411475 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science-Encyclopedias, Juvenile
<br/><br/><label>Dewey Class. No.: </label>503