Penny, Malcolm,  <br/><br/>
Pencemaran dan pemuliharaan 

 - 48 pages :   colour illustrations ;   28 cm 
 - Dunia kita .
 - Dunia kita .
<br/><br/><label>ISBN: </label>9676719633 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution--Environmental aspects--Juvenile
<br/><br/><label>Dewey Class. No.: </label>551