Author
Infobase,
Green Planet Films
13
BBC (Firm)
11
Public Broadcasting Service (U.S.)
8
ClickView/VEA (Firm)
6
Australian Broadcasting Corporation
2
Cerebellum Corporation
2
Inside Science (Firm)
2
Network Ireland Television
2
NewsHour Productions
2
Allied Environmental Services Australia Pty Ltd (Firm)
1
BBC Worldwide Learning
1
Cable News Network
1
Collective Eye Films
1
Intelligence² (U.S.)
1
Java Films (Firm)
1
Off the Fence Productions
1
PBS (Firm)
1