Welch, E. B. <br/><br/>
Ecological effects of waste water / 
E. B. Welch, with hydrographic characteristics by T. Lindell. 
 - Cambridge :  Cambridge University Press,  1980. 
 - xii, 337 p. :  ill. 
<br/><br/><label>ISBN: </label>0521224950 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Environmental aspects.