U.S. Environmental Protection Agency; Environment Canada; United Nations Environment Program
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Environmental Protection Agency, Washington, DC Environment; Environment Canada, Ottawa, Ontario; United Nations Environment Program
U.S. Environmental Protection Agency; Environment Canada and United National Environmental Program. International CFC and Halon Alternatives Conference, 1993. Stratospheric Ozone Protection for the 90's. October 20-22, 1993,
Washington, DC,
742-847 p.,
1993