HOLECTYPOIDA/PALAEOZOOLOGY
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BTECHINOIDEA + SEA URCHINS (PALAEOZOOLOGY)
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UDC563.9,052.51
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Descriptor GERHOLECTYPOIDA/PALÄOZOOLOGIE
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Descriptor ENGHOLECTYPOIDA/PALAEOZOOLOGY
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Descriptor FREHOLECTYPOIDA/PALÉOZOOLOGIE
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NTCONULIDAE (PALAEOZOOLOGY)