Quek, Lawrence, <br/><br/>
PEMBERSIHAN AIR / 
LAWRENCE QUEK 
 - 22 pages :  colour illustrations ;  27 cm 
 - SIRI PERIHAL AIR .
 - Siri perihal air .
<br/><br/><label>ISBN: </label>9789672260783  RM260.00 9789672260806  RM52.00 
<br/><br/><label>Nat. Bib. No.: </label>M21-06781 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water<br/>Water--Purification
<br/><br/><label>Dewey Class. No.: </label>553.7