Zickefoose, Chuck <br/><br/>
Anaerobic sludge digestion :  operations manual / 
by Chuck Zickefoose, R. B. Joe Hayes 
 - Washington :  Office of Water Program Operations, U.S. Environmental Protection Agency,  1976 
 - 1v. :  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal<br/>Sewage--Purification