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Ice on rivers
Yukon River (Yukon and Alaska)
lakes
5
etc.--Yukon River (Yukon and Alaska)
3
Limnology Polar
2
Rivers--Yukon
2
etc.--Alaska
2
Boats--Yukon
1
Crowds--Alaska--Circle
1
Dogs--Yukon
1
Freight and freightage--Yukon
1
Ice--Alaska--Circle
1
Ice--Yukon
1
Rafts--Yukon
1
Rivers--Alaska--Circle
1
Tents--Yukon
1
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