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3Published 1989Subjects: “...Pollution Soviet Union....”
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8Published 1990Subjects: “...Water Pollution Mississippi River....”
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9Published 1990Subjects: “...Air Pollution California Los Angeles....”
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10Published 2004Subjects: “...Water Pollution United States....”
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12Published 1990Subjects: “...Pollution Environmental aspects....”
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13Published 1999Subjects: “...Pollution control industry....”
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16Published 1990Subjects: “...Pollution Environmental aspects Developing countries....”
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20Published 1992Subjects: “...Water Pollution Mexico Matamoros....”
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