MIDDLE DEVONIAN (STRATIGRAPHY)
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BTDEVONIAN (STRATIGRAPHY)
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UDC551.734.4
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Descriptor GERMITTELDEVON (STRATIGRAPHIE)
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Descriptor ENGMIDDLE DEVONIAN (STRATIGRAPHY)
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Descriptor FREDEVONIEN/MOYEN (STRATIGRAPHIE)
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Variant GERDEVON/MITTLERES DEVON (STRATIGRAPHIE)
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Variant ENGDEVONIAN/MIDDLE DEVONIAN (STRATIGRAPHY)
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NTEIFELIAN (STRATIGRAPHY)
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NTGIVETIAN (STRATIGRAPHY)
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RTDEVONIAN (STRATIGRAPHY)