Ammar Khalis, <br/><br/>
Pulih dan Pelihara Udara / 
Ammar Khalis 
 - 56 pages :  colour photographs ;  26 cm. 
 - SIRI SAINS ALAM SEKITAR .
 - Siri sains alam sekitar .
<br/><br/>Bibliography: page 56 
<br/><br/><label>ISBN: </label>9789670787930  RM177.00 9789670787978  RM44.25 
<br/><br/><label>Nat. Bib. No.: </label>M21-02460 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences<br/>Air--Pollution<br/>Air quality management
<br/><br/><label>Dewey Class. No.: </label>333.72