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National Science Foundation (U.S.). Division of Polar Programs
16
National Science Foundation (U.S.)
14
United States. Central Intelligence Agency
13
United States. Naval Oceanographic Office
10
United States. Department of State
8
United States. Hydrographic Office
8
Cold Regions Research and Engineering Laboratory (U.S.)
6
Geological Survey (U.S.)
6
United States. Antarctic Projects Office
6
United States. Congress. Senate. Committee on Foreign Relations
6
Hartwig, G. (Georg), 1813-1880
5
National Science Foundation (U.S.). Office of Antarctic Programs
5
Scott, Robert Falcon, 1868-1912
5
United States Antarctic Research Program
5
United States. Congress. Senate. Committee on Commerce, Science, and Transportation. Subcommittee on Science, Technology, and Space
5
Shackleton, Ernest Henry, Sir, 1874-1922
4
U.S. Coast and Geodetic Survey
4
Alberts, Fred G.
3
Cook, Frederick Albert, 1865-1940
3
Environmental Research Laboratories (U.S.)
3
Hooker, Joseph Dalton, Sir, 1817-1911
3
Mellor, Malcolm
3
National Science Foundation (U.S.). Office of Polar Programs
3
United States Board on Geographic Names
3
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Territorial and Insular Affairs
3
United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Science
3
United States. Congress. House. Committee on Science. Subcommittee on Basic Research
3
United States. Defense Mapping Agency. Hydrographic/Topographic Center
3
United States. Dept. of State
3
United States. Office of Geography
3
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Research
21
Environmental protection
13
Oceanography
12
Ice
11
Voyages and travels
11
Environmental law
10
United States Antarctic Research Program
10
Marine resources conservation
9
Scientific expeditions
9
Geology
7
Antarctica
6
Meteorology
6
Pilot guides
6
Atmospheric ozone
5
Environmental monitoring
5
Environmental policy
5
Geomagnetism
5
Natural resources
5
Seals (Animals)
5
Antarctic Treaty (1959 December 1)
4
Antarctic Treaty (1959)
4
Atmospheric temperature
4
Discovery (Ship)
4
Glaciers
4
Marine pollution
4
Mines and mineral resources
4
Natural history
4
Sea ice
4
United States Antarctic Program
4
Waste disposal in the ocean
4
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Antarctic
236
The Antarctic
77
Arctic
19
Pacific
10
South Pole
10
Byrd
9
New Zealand
6
Ross Sea
6
Antarctic Peninsula
5
Greenland
3
Indian
3
Shackleton
3
Victoria Land
3
Arlington
2
Atka
2
Canada
2
Cape Horn
2
Goodwin
2
Greenwich
2
Hobbs
2
Little America
2
Marguerite
2
Marguerite Bay
2
McMurdo Sound
2
Northwest Passage
2
Patagonia
2
Sandwich Islands
2
St. Helena
2
Antarctic Ocean
1
Bage
1
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Antarc*
Antarctic
236
Antarctica
106
Arctic
19
South pole
10
Ross Sea
6
Alaska
5
Antarctic Peninsula
5
Sea ice
5
United States Antarctic Program
5
Ice Sheet
4
Greenland
3
Ice Shelf
3
National Science Foundation Office of Polar Programs
3
Victoria Land
3
Iceland
2
McMurdo Sound
2
North Atlantic
2
Northwest passage
2
Tierra del Fuego
2
Antarctic Ocean
1
Arctique*
1
Cold Regions Bibliography Project
1
Enderby Land
1
Fridtjof Nansen
1
Heard Island
1
MacRobertson Land
1
Macquarie Island
1
McMurdo Ice Shelf
1
North Pole
1
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