Principles of sewage treatment.

Mode of access: Internet.

The three sludge system for nitrogen and phosphorus removal /

"Presented at the 44th Annual Conference of the Water Pollution Control Federation, San Francisco, California (October, 1971)"--P. 1.

Report.

Mode of access: Internet.

Blueprint to end ocean pollution : report /

Cover title.

Conference in the Matter of Pollution of the Interstate Waters of the Monongahela River and its Tributaries.

Mode of access: Internet.

Transcript of Conference: Pollution of Interstate Waters of the Potomac River in the Washington Metropolitan Area.

Cover title.

Conference in the Matter of Pollution of the Interstate Waters of the Upper Mississippi River, St. Paul, Minnesota, February 8, 1964.

Mode of access: Internet.

Conference on Pollution of Interstate Waters of the Bear River, Utah-Wyoming-Idaho. [Transcript.

Mode of access: Internet.

Conference in the matter of: Progress meeting in the matter of pollution of the interstate waters of the Grand Calumet River, Little Calumet River, Calumet River, Wolf Lake, Lake Michigan and their tributaries, Wednesday, March 15, 1967, Chicago, Illinois.

Cover title: Progress evaluation meeting in the matter of pollution of the interstate waters of the Grand Calumet River...

Study of needs for sewage works; report.

Report no. 2 issued jointly by the Office for Local Government and the Dept. of Health.

Conference in the matter of Pollution of the Interstate Waters of the Lower Mississippi River : proceedings : May 5-6, 1964, New Orleans, Louisiana.

"Held under the provisions of Section 8 of the Federal Water Pollution Control Act"--v. 1, p. 3.

Anacostia River sewage treatment works, contract No. 9.

At head of title: P. W. A. Project No. Md. 1185-F. Washington Suburban Sanitary District.

Contract volume for the construction of intercepting sewer and sewage treatment project. Sewage treatment plant. P. W. A. Project no. N. Y. 1034-R. Engineers: Greeley and Hansen.

Cover titles.

Contract volume for the construction of intercepting sewer and sewage treatment project. Intercepting sewer. P. W. A. Project no. N. Y. 1034-R. Engineers: Greeley and Hansen.

Cover titles.

Character and control of sea pollution by oil /

Mode of access: Internet.