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Subject
- united states antarctic service expedition (1939-1941)622
- byrd antarctic expedition614
- mercer, john h., 1922-198742
- scientific expeditions21
- discovery and exploration8
- byrd, richard evelyn, 1888-19576
- explorers5
- ellsworth, lincoln, 1880-19514
- penguins4
- airplanes3
- icebreakers (ships)3
- operation deep freeze3
- wilkins, george h. (george hubert), sir, 1888-19583
- byrd antarctic expedition (2nd : 1933-1935)2
- hearst, william randolph, 19082
- mittens2
- sea ice2
- adélie penguin1
- antarctica--aerial exploration1
- bennett, floyd1