Author
Infobase,
BBC (Firm)
9
Global Screen
7
Cerebellum Corporation
4
Video Education America
4
Off the Fence Productions
3
555 Productions (Firm)
2
Arts and Entertainment Network
2
Balanga (Firm)
2
Film Ideas (Firm)
2
Public Broadcasting Service (U.S.)
2
Arte France cinéma (Firm)
1
Australian Broadcasting Corporation
1
BBC Worldwide Learning
1
ClickView/VEA (Firm)
1
Illuminations (Firm)
1