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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
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2.- BLACK CARBON IN TERRA PRETA AND OXISOLS OF THE BRAZILIAN AMAZON AS ESTIMATED BY BENZENECARBOXYLIC ACIDS AS SPECIFIC MARKERS
AMERICAN CHEMICAL SOCIETY; WASHINGTON, DC; USA; UNITED STATES, 1999
AMERICAN CHEMICAL SOCIETY 217TH NATIONAL MEETING; ABSTRACTS OF PAPERS
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3.- THE "TERRA PRETA" PHENOMENON; A MODEL FOR SUSTAINABLE AGRICULTURE IN THE HUMID TROPICS
SPRINGER-VERLAG; BERLIN; DEU; FEDERAL REPUBLIC OF GERMANY, 2001
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