Gray, N. F. <br/><br/>
Water technology: an introduction for environmental scientists and engineers / 
Gray N F 
 - New Delhi :  Viva Books Private,  2000 
 - vii,548 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>8176491535 :  1,492 baht 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality management<br/>Sewage disposal<br/>Freshwater biology<br/>Water quality biological assessment<br/>Water-supply
<br/><br/><label>Dewey Class. No.: </label>628.1  / G73W 2000