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Arctic
5
Arctic routes
5
Northeast Passage
5
Northwest Passage
5
sea shipping and transportation
shipping
5
Arctique
3
Northern Sea Route
3
Route maritime du Nord
3
geo
3
passage du Nord-est
3
passage du Nord-ouest
3
routes arctiques
3
transport maritime
3
envir
2
G1-922
1
Geography (General)
1
archeo
1
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