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Andrée
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Arctic
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Balloon
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Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften
Dewey Decimal Classification500 | Naturwissenschaften551 | Geologie, Hydrologie, Meteorologie
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North Pole
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Spitsbergen
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Svalbard
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Svalbard and Jan Mayen
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Twentieth century reanalysis
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balloon observation
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exploration
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meteorology
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twentieth century
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wind
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