National forest management : hearings before the Subcommittee on Forests, Family Farms, and Energy of the Committee on Agriculture, House of Representatives, One Hundred First Congress, first and second sessions, November 9, 1989, Status of National forest land and resource management plans ; November 15, 1989, Timber harvesting systems and nontimber resource management ; November 21, 1989, Timber sale economics and information reporting system ; March 6, 1990, National forest timber supply outlook and sustainable timber yeild

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