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Subject
- Discovery and exploration5
- Aircraft accidents3
- American3
- History3
- Byrd Antarctic Expedition2
- Survival after airplane accidents, shipwrecks, etc2
- Aerial exploration1
- Aeronautics1
- Airplanes1
- Aviation1
- Cold War1
- Cold weather operation1
- Douglas DC-3 (Transport plane)1
- Exploration1
- Government policy1
- HISTORY / Europe / Russia & the Former Soviet Union1
- HISTORY / Modern / 20th Century1
- HISTORY / United States / 20th Century1
- International Geophysical Year, 1957-19581
- Nationalism1