Ontario Industrial Waste Conference Toronto, Ont., & Ontario. Ministry of the Environment. (1986). 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. Ministry of the Environment.

Ontario Industrial Waste Conference Toronto, Ont., and Ontario. Ministry of the Environment. 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. [Toronto]: Ministry of the Environment, 1986.

Ontario Industrial Waste Conference Toronto, Ont., and Ontario. Ministry of the Environment. 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. Ministry of the Environment, 1986.