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The United States and Antarctica in the 21st century hearing before the Committee on Science, U.S. House of Representatives, One Hundred Fifth Congress, first session, March 12, 1997
- "The United States and Antarctica in the 21st century hearing before the Committee on Science, U.S. House of Representatives, One Hundred Fifth Congress, first session, March 12, 1997"@en
- "The United States and Antarctica in the 21st century : hearing before the Committee on Science, U.S. House of Representatives, One Hundred Fifth Congress, first session, March 12, 1997"@en