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AGE
8
Continuous Flow Analysis
GRIP
8
Sampling/drilling ice
8
CFA
4
DEPTH
4
DEPTH, ice/snow
4
Drilling/drill rig
4
GRIP/GISP/NGRIP
4
Greenland
4
Greenland Ice Core Projects
4
Greenland Ice Core Projects GRIP/GISP/NGRIP
4
ISTUK
4
ISTUK electromechanical drill
4
ice/snow
4
Ammonium
2
Calcium
2
Formaldehyde
2
Hydrogen peroxide
2
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