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1.- MICROFLORAL AND PETROGRAPHIC STUDIES OF COAL SEAMS OF THE LUBLIN COAL BASIN/POLAND;
 MADRID, 1983
CONGRESO INTERNACIONAL DE ESTRATIGRAFIA Y GEOLOGIA DEL CARBONIFERO. 10. ABSTRACTS/1983/MADRID
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2.- PETROGRAPHIC COMPOSITION OF COALS FROM THE LUBLIN COAL BASIN AND ITS VARIATION IN STRATIGRAPHIC SECTION, POLAND;
MADRID, 1983
CONGRESO INTERNACIONAL DE ESTRATIGRAFIA Y GEOLOGIA DEL CARBONIFERO. 10. ABSTRACTS/1983/MADRID
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