Environmental monitoring of a wastewater treatment plant / 
United States, Environmental Protection Agency 
 - Washington, D. C. :  United States Environmental Protection Agency,  1979 
 - ix, 125 p. ;  28 cm. 
<br/><br/> EPA-600/179-027 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal plants<br/>Sewage--Purification--Biological treatment<br/>Sewage sludge--Management
<br/><br/><label>Dewey Class. No.: </label>628.3