Sewage sludge entrenchment system for use by small municipalities / 
J. M. Walker...[et al.] 
 - Washington, D.C. :  United States Environmental Protection Agency,  1978 
 - ix, 71 p. :  ill. ;  29 cm. 
 - Environmental protection technology series .
<br/><br/> EPA-600/2-78-018 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage<br/>Pollution
<br/><br/><label>Dewey Class. No.: </label>363.7284