Clean waters
Subtitle: toward a healthy Great Lakes-St. Lawrence ecosystem.
Contributors: Canada. Environment Canada.
Publisher: Environment Canada]
Published: 1990
Place of publication: [Ottawa, Ont
Language: eng
Number of pages: 23
Subjects: Water quality management -- Great Lakes.; Water quality management -- Saint Lawrence River.; Water -- Pollution -- Great Lakes.; Water -- Pollution -- Saint Lawrence River.
Other titles: Toward a healthy Great Lakes-St. Lawrence ecosystem.
Notes: Title from cover.