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DRILL
Drilling/drill rig
12
GRIP/GISP/NGRIP
12
Greenland Ice Core Projects
12
Sampling/drilling ice
12
δ18O
water
11
Age
7
GISP
7
GISP2
6
GRIP
6
Greenland
6
AGE
5
DEPTH
5
ice/snow
5
Isotope ratio mass spectrometry
2
Argon/Nitrogen ratio
1
Calcium
1
Carbon dioxide/Nitrogen ratio
1
GISP2-B
1
GRIP891
1
GRIP892
1
GRIP893
1
GRIP912
1
GRIP913
1
ISTUK
1
ISTUK electromechanical drill
1
Oxygen/Argon ratio
1
Oxygen/Nitrogen ratio
1
adjusted/corrected
1
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