Narrow Search
Ice and Permafrost
4
Snow
4
*ICE
2
FRESH WATER
2
LAKES
2
Machinery and Tools
2
TEST AND EVALUATION
2
*ARCTIC REGIONS
1
*CRYSTALS
1
*CUTTING
1
*CUTTING TOOLS
1
*DRILLING
1
*EARLY WARNING SYSTEMS
1
*FLEXURAL STRENGTH
1
*GLACIERS
1
*ICE CAPS
1
*ICE CRYSTALS
1
*ICE DRILLING
1
*RUSSIA
1
*RUSSIAN POLAR RESEARCH
1
*SCIENTIFIC RESEARCH
1
*SOVIET POLAR RESEARCH
1
*STRUCTURAL ANALYSIS
1
AIR FORCE
1
ANTARCTIC REGIONS
1
ARCTIC REGIONS
1
AST24
1
Antarctica -- Discovery and exploration -- Interviews
1
Arctic regions -- Discovery and exploration -- Interviews
1
BOREHOLES
1
see all ...