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1.- CLYPEOLUS, A NEW ACRITARCH GENUS FROM THE ORDOVICIAN AND SILURIAN ELSEVIER; AMSTERDAM; NLD; NETHERLANDS, 1997 FESTSCHRIFT FOR HELEN TAPPAN AND ALFRED R. LOEBLICH JR. Ver registro
2.- PALEOCLIMATOLOGIC, PALEOECOLOGIC AND BIOSTRATIGRAPHIC SIGNIFICANCE OF THE MIDDLE CRETACEOUS ELATERATE MICROFLORAL PROVINCE, GONDWANA AMERICAN ASSOCIATION OF PETROLEUM GEOLOGISTS; TULSA, OK; USA; UNITED STATES, 1998 AAPG INTERNATIONAL CONFERENCE AND EXHIBITION; ABSTRACTS Ver registro
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