Proceedings of the Thirty-third Ontario Industrial Waste Conference : held at the Prince Hotel Toronto, Ontario June 15-18, 1986 : sponsored by the Ontario Ministry of the Environment

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• Proceedings of the Thirty-fourth Ontario Industrial Waste Conferences : held at the Prince Hotel Toronto, Ontario June 14-17, 1987 : sponsored by the Ontario Ministry of the Environment
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• Proceedings of the twenty-fifth silver anniversary of the Ontario Industrial Waste Conference held at the Prince Hotel, June 18-21, 1978 : sponsored by the Ontario Ministry of the Environment
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• Proceedings [of] 19th Ontario Industrial Waste Conference, June 18-21, 1972, Toronto, Ontario
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• Proceedings of the twenty-sixth Ontario Industrial Waste Conference held at the Prince Hotel, Toronto, Ontario, June 17-20, 1979
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