LOWER DEVONIAN (STRATIGRAPHY)
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BTDEVONIAN (STRATIGRAPHY)
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UDC551.734.2
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Descriptor GERUNTERDEVON (STRATIGRAPHIE)
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Descriptor ENGLOWER DEVONIAN (STRATIGRAPHY)
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Descriptor FREDEVONIEN/INFERIEUR (STRATIGRAPHIE)
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Variant GERUNTERES DEVON (STRATIGRAPHIE)
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Variant GERDEVON/UNTERES DEVON (STRATIGRAPHIE)
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Variant ENGDEVONIAN/LOWER DEVONIAN (STRATIGRAPHY)
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NTEMSIAN (STRATIGRAPHY)
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NTGEDINNIAN (STRATIGRAPHY)
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NTSIEGENIAN (STRATIGRAPHY)
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RTDEVONIAN (STRATIGRAPHY)