Ramalho, R. S. <br/><br/>
Introduction to wastewater treatment processes / 
R.S. Ramalho. 
 - 2nd ed. 
 - New York :  Academic Press,  1983. 
 - ix, 580 p. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographies and indexes. 
<br/><br/><label>ISBN: </label>0125765606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage--Purification.