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 - 52 pages :   illustrations ;   14 cm 
 - Alam sekitar dan ekosistem .
 - Alam sekitar dan ekosistem .
<br/><br/><label>ISBN: </label>9789670172217 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution - Environmental aspects - Juvenile literature. ; Environmental protection - Juvenile literature.
<br/><br/><label>Dewey Class. No.: </label>363.7