FISSURES + GROTTOES + CAVES + CAVERNS + CAVINGS (GEOMORPHOLOGY)
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BTSPELEOLOGY (GEOMORPHOLOGY)
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UDC551.442
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Descriptor GERHÖHLEN + GROTTEN + ERDFÄLLE + ERDSPALTEN (GEOMORPHOLOGIE)
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Descriptor ENGFISSURES + GROTTOES + CAVES + CAVERNS + CAVINGS (GEOMORPHOLOGY)
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Descriptor FREGROTTES + CAVERNES + FISSURES KARSTIQUES (GÉOMORPHOLOGIE)
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Variant GERGROTTEN/GEOMORPHOLOGIE
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Variant GERERDFÄLLE (GEOMORPHOLOGIE)
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Variant GERHÖHLEN (GEOMORPHOLOGIE)
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Variant GERERDSPALTEN (GEOMORPHOLOGIE)
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Variant ENGFISSURES (GEOMORPHOLOGY)
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Variant ENGGROTTOES (GEOMORPHOLOGY)
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Variant ENGCAVES (GEOMORPHOLOGY)
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Variant ENGCAVERNS (GEOMORPHOLOGY)
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Variant ENGCAVINGS (GEOMORPHOLOGY)
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Variant FREGROTTES (GÉOMORPHOLOGIE)
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Variant FRECAVERNES (GÉOMORPHOLOGIE)
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Variant FREGOUFFRES (GÉOMORPHOLOGIE)
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Variant FREFISSURES/KARSTIQUES (GÉOMORPHOLOGIE)
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Variant FREAVEN (GÉOMORPHOLOGIE)
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NTGEOGLYPHS, ANTHROPOGENIC RELIEF FORMS (GEOMORPHOLOGY)
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NTCAVERNS, ANTHROPOGENIC RELIEF FORMS (GEOMORPHOLOGY)
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NTPETROGLYPHS, ANTHROPOGENIC PICTOGRAMS (GEOMORPHOLOGY)
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NTSTALACTITES + STALAGMITES (GEOMORPHOLOGY)