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1Published 1991“...Center for Environmental Research Information,...”
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2Published 1993“...Center for Environmental Research Information,...”
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3Published 1993“...Center for Environmental Research Information,...”
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4Published 1993“...Center for Environmental Research Information,...”
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5Published 1991“...Center for Environmental Research Information,...”
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6Published 1991“...Center for Environmental Research Information,...”
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7Published 1990“...Center for Environmental Research Information,...”
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