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North Pole
3
Spitsbergen
Svalbard
3
Andrée
2
Arctic
2
Balloon
2
Svalbard and Jan Mayen
2
Twentieth century reanalysis
2
balloon observation
2
exploration
2
meteorology
2
twentieth century
2
wind
2
Airships
1
Alaska
1
Arctic regions
1
Dewey Decimal Classification500 | Naturwissenschaften550 | Geowissenschaften
1
Dewey Decimal Classification500 | Naturwissenschaften551 | Geologie, Hydrologie, Meteorologie
1
Frantsa-Iosifa
1
History
1
Remote sensing
1
Russian Federation
1
Zemlya
1
ddc:550
1
ddc:551
1
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