Environmental water pollution and its control / 
editors G.R. Chhatwal ... [et al.] 
 - Delhi :  Anmol Publications,  1989 
 - 532 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>8170412145 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution--Environmental aspects