SAND + GRAVEL + PEBBLES + NATURAL SAND-GRAVEL MIXTURE (MINERAL DEPOSITS)
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BTECONOMIC MINERALS AND EARTHS, INORGANIC (MINERAL DEPOSITS)
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UDC553.62
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Descriptor GERQUARZ + FEUERSTEIN + SAND + KIES (LAGERSTÄTTEN)
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Descriptor ENGSAND + GRAVEL + PEBBLES + NATURAL SAND-GRAVEL MIXTURE (MINERAL DEPOSITS)
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Descriptor FREQUARTZ + PIERRE A FEU + SABLE + GRAVIER (GISEMENTS)
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Variant FREPIERRE/A FEU (GISEMENTS)
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NTGRAVEL + PEBBLE + SHINGLE (MINERAL DEPOSITS)
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NTSANDS (MINERAL DEPOSITS)
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RTGRAVEL + PEBBLE + SHINGLE (MINERAL DEPOSITS)
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RTSANDS (MINERAL DEPOSITS)