Management of small to medium sized municipal waste water treatment plants / 
by Culp-Wesner Culp-Clean Water Consultants ; prepared by U. S. Environmental Protection Agency, Office of Water Program Operations 
 - 145 páginas 
<br/><br/> Epa contract no. 68-01-4917 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plantas depuradoras de agua<br/>Aguas residuales--Purificación
<br/><br/><label>LC Class. No.: </label>TD745  / E88