Technical report
Subtitle: upgrading trickling filters
By: by Donald M. Pierce ; prepared for Environmental Protection Agency, Office of Water Program Operations
Contributors: United States. Environmental Protection Agency. Office of Water Program Operations
Publisher: The Office
Published: 1980
Place of publication: Washington, DC
Language: eng
Subjects: Trickling filters
Notes: "July 1978."

"EPA 430/9-78-004."

"MCD-42."