Welch, E. B. <br/><br/>
Ecological effects of waste water / 
E.B. Welch ; with hydrographic characteristics by T. Lindell. 
 - 2nd ed. 
 - London :  Chapman & Hall,  1992. 
 - x, 425 p. :  ill. 
<br/><br/><label>ISBN: </label>041234940X 
<br/><br/><label>LCCN: </label>93015170     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Environmental aspects.