Active mining operations in the Province of Ontario, July 1, 1978
Subtitle: a water pollution control status report.
Contributors: Ontario. Ministry of the Environment.
Publisher: Ontario Ministry of the Environment]
Published: 1979
Place of publication: [Toronto
Language: eng
Number of pages: 75
Subjects: Mineral industries -- Waste disposal -- Ontario.; Mineral industries -- Environmental aspects -- Ontario.; Water -- Pollution -- Ontario.; Effluent quality -- Ontario.
Notes: "Confidential, restricted circulation."

"2nd printing, June 1, 1979."--Cover.