50 simple things you can do to save the earth 
the Earth Works Group. 
 - 1st ed. 
 - Berkeley, CA :  Earthworks Press,  1989. 
 - 96 pages ;  21 cm. 
<br/><br/>
<br/><br/><label>ISBN: </label>0929634063 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection -- Juvenile literature.<br/>Environmental protection.
<br/><br/><label>LC Class. No.: </label>TD171.7 
<br/><br/><label>Dewey Class. No.: </label>363.70525 F4696 1989