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Detailed study of selenium in soil, representative plants, water, bottom sediment, and biota in the Kendrick Reclamation Project area, Wyoming, 1988-90
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External quality-assurance results for the National Atmospheric Deposition Program
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External quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 1986
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External quality-assurance results for the National Atmospheric Deposition Program and the National Trends Network during 1987
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Programs and analytical methods for the U.S. Geological Survey acid rain quality-assurance project
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