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1.- CARBONIFEROUS AND EARLY PERMIAN SPORE ASSEMBLAGES OF NORTH CHINA REGION AND THE BOUNDARY OF THE CARBONIFEROUS AND PERMIAN;
 MADRID: X CONGR. INST. ESTATIGR. GEOL., 1985
CONGRES INTERNATIONAL DE STRATIGRAPHIE ET DE GEOLOGIE DU CARBONIFERE. 10/1983-09-12/MADRID
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