Continuing need for improved operation & maintenance of municipal waste treatment plants. 

 - [Washington, D.C.,  1977]. 
 - 1 v. 
<br/><br/> 4/11/77.  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sewage disposal plants--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>GA 1.13:CED-77-46