156 resultados para Technical and economic return
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Submitted to the Environmental Protection Agency on Sept. 12, 1977.
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Issued June 1980.
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Issued Aug. 1980.
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"Submitted to the Environmental Protection Agency on September 12, 1977 and November 30, 1978."
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Prepared in cooperation with state agricultural stations, cooperative extension service, and other state agencies.
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In cooperation with State agricultural experiment stations, Cooperative Extension Services, other state agencies, U.S. Envioronmental Protection Agency.
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In cooperation with state agricultural experiment stations, Cooperative Extension Service, other state agencies, U.S. Environmental Protection Agency.
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Cover title.
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"References for the different studies": p. 3-7.
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Cover title.
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"March 1, 1989; Updated May 18, 1989."
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Mode of access: Internet.
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"August 2000."
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"January 2001."
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Mode of access: Internet.