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Properties and structure of hard coals from a borehole Niedobczyce IG-1 in the Rybnik Coal District, Upper Silesian Coal Basin, their petrographic and group constituents 4. The structure of asphaltenes separated from tetralin extracts of coals

Author： Matuszewska A. John A. Jasienko S.

Publisher： Elsevier

ISSN： 0378-3820

Source： Fuel Processing Technology, Vol.51, Iss.1, 1997-03, pp. : 145-155

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