Kolbas, Grace Holden <br/><br/>
Ecology :  cycle and recycle / 
by Grace Holden Kolbas 
 - New York :  Sterling,  1972 
 - 168 p.:  ill. ;  24 cm. 
 - Basic biology in color series, v.5 .
<br/><br/><label>ISBN: </label>0806935588 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Juvenile literature