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1.- BLACK CARBON IN DENSITY FRACTIONS OF ANTHROPOGENIC SOILS OF THE BRAZILIAN AMAZON REGION PERGAMON; OXFORD-NEW YORK; III; INTERNATIONAL, 2000 CHEMICAL STRUCTURE AND PRESERVATION PROCESSES OF ORGANIC MATTER IN SOILS AND SEDIMENTS; PROCEEDINGS OF A SYMPOSIUM HELD AT THE SPRING 1999 NATIONAL MEETING IN ANAHEIM OF THE AMERICAN CHEMICAL SOCIETY, DIVISION OF GEOCHEMISTRY Ver registro
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