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Observation
4
Aerial survey
3
Beaufort Sea
3
Beaufort_Sea
3
DATE/TIME
3
Delphinapterus leucas
3
OBSE
3
Sample amount
3
Sample comment
3
Date/time end
2
Number
2
Profile/sampling length
2
Category
1
Duration
1
Duration, number of days
1
IPY
1
International Polar Year (2007-2008)
1
Parameter
1
expected
1
number of days
1
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