Effects of atmospheric pollution on forest ecosystems : hearings before the Subcommittee on General Oversight, Northwest Power, and Forest Management of the Committee on Interior and Insular Affairs, House of Representatives, Ninety-ninth Congress, first and second session ... H.R. 2963 ... hearings held July 16, 1985: Washington, DC, December 2, 1986: Eugene, OR

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United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on General Oversight, Northwest Power, and Forest Management

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