Ettlich, William F. <br/><br/>
Operations manual :  sludge handling and conditioning / 
by William F. Ettlich, Daniel J. Hinrichs and Thoman S. Lineck 
 - Washington, D.C. :  U.S. Government Printing Office,  1978 
 - Various pagings ;  28 cm. 
<br/><br/> EPA-430/9-78-002 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water--Pollution<br/>Sewage--Purification
<br/><br/><label>Dewey Class. No.: </label>628.168