Author
Infobase,
141
Public Broadcasting Service (U.S.)
32
Broken Arrow Media (Firm)
28
Trader Multimedia Inc. (Firm)
18
National Geographic Digital Media (Firm)
9
SpringerLink (Online service)
9
BBC (Firm)
7
Arts and Entertainment Network
6
Films for the Humanities & Sciences (Firm)
6
Infobase
6
ScienceDirect (Online service)
6
Espresso TV (Firm)
5
Ordway, Frederick I., III 1927-2014
5
TVF International (Firm)
5
United States. National Aeronautics and Space Administration
5
Economist Group Limited (Firm)
3
United States. Congress. House. Committee on Science, Space, and Technology
3
United States. Space Force,
3
Vakoch, Douglas A.
3
Australian Broadcasting Corporation
2
Billings, Linda,
2
Cable News Network
2
Carroll, Michael, 1955-
2
Ciné Fête
2
European Science Foundation. Space Science Committee
2
Film Ideas (Firm)
2
Inside Science (Firm)
2
NASA Advisory Council. Space Systems and Technology Advisory Committee
2
National Geographic Society (U.S.)
2
National Research Council (U.S.)
2
Solar System Exploration @ 50
2
Solar System Exploration @ 50 Washington, D.C.),
2
United States. Advisory Committee on the Future of the U.S. Space Program
2
United States. Congress. House. Committee on Armed Services. Strategic Forces Subcommittee,
2
United States. Congress. House. Committee on Science, Space, and Technology (2011- ),
2
United States. Congress. House. Committee on Science, Space, and Technology (2011- ). Subcommittee on Space,
2
United States. Department of Defense,
2
United States. NASA History Division,
2
United States. NASA History Program Office
2
3Boxmedia (Firm)
1
American Public Television
1
Armstrong, Rachel, 1966-
1
BBC Worldwide Learning
1
BBC Worldwide Ltd
1
Barron, Bebe,
1
Barron, Louis, 1920-1989,
1
Big Media Holdings LLC (Firm)
1
Bloomberg LP
1
Cambridge Educational (Firm)
1
Cameron, Winifred Sawtell
1
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