Palhaya, J.P. <br/><br/>
Environmental impact of sewage effluent disposal on the river system 
J.P. Palhaya, V.K. Siviah and; Shobna Malviya. 
 - 15th. ed. 
 - New Delhi  Ashish Publishing House  1993 
 - vii,179p., 22cm. 
<br/><br/><label>ISBN: </label>81-7024-540-0. 
<br/><br/><label>Dewey Class. No.: </label>363.735  / P13E