Research report.
Contributors: Canada. Environment Canada.; Ontario. Ministry of the Environment
Published: 1972
Place of publication: [Ottawa
Language: eng
Subjects: Water -- Pollution -- Great Lakes; Water quality management; Phosphorus; Sewage disposal; Sewage -- Purification
Notes: Cover title.

Joint research project of environment Canada and Ontario Ministry of the Environment.

Summary in French.

Includes bibliographies.
Table of contents: value: "For contents see Shelf List."