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1
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2LlyfrCyhoeddwyd 1986“...International Geological Correlation Programme. Project 169...”
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3CylchgrawnCyhoeddwyd 1981“...International Geological Correlation Programme. Project 156 Phosphorites...”
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4Llyfrgan Plassche, Orson van de“...International Geological Correlation Programme. Project "The Sea-Level Project."...”
Cyhoeddwyd 1982
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5
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6
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7Trafodyn Cynhadledd LlyfrCyhoeddwyd 1989“...International Geological Correlation Programme...”
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8Trafodyn Cynhadledd LlyfrCyhoeddwyd 1971“...Intergovernmental Conference of Experts for Preparing an International Geological Correlation...”
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9LlyfrCyhoeddwyd 1986“...International Geological Correlation Programme. Project no. 174 on "Geological Events at the Eocene...”
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10Cylchgrawn
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11LlyfrCyhoeddwyd 1983“...International Geological Correlation Programme. Project 169...”
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12LlyfrCyhoeddwyd 1963“...International Geological Correlation Programme...”
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13LlyfrCyhoeddwyd 1982“...International Geological Correlation Programme. Project #61--Sealevels of the Last 15,000 Years...”
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14Trafodyn Cynhadledd LlyfrCyhoeddwyd 1982“...International Geological Correlation Programme...”
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15LlyfrCyhoeddwyd 1978“...International Geological Correlation Programme. Project 91 "Metallogeny of the Precambrian"...”