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1.- DENSITY FRACTIONATION OF A HIGH-ASH BRAZILIAN SUB-BITUMINOUS COAL; IMPLICATIONS FOR CHEMICAL AND PETROLOGICAL PROPERTIES
GEOLOGICAL INSTITUTE OF HUNGARY; BUDAPEST; HUN; HUNGARY, 2004
56TH ANNUAL MEETING OF THE INTERNATIONAL COMMITTEE FOR COAL AND ORGANIC PETROLOGY; ENVIRONMENTAL MANAGEMENT IMPLICATIONS OF ORGANIC FACIES STUDIES; ABSTRACT BOOK
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2.- THE CURRENT STATUS OF THE BRAZILIAN COAL INDUSTRY
TRADE LINK PUBLICATIONS; BETCHWORTH, SURREY; GBR; UNITED KINGDOM, 1997
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