Author
Infobase,
63
Public Broadcasting Service (U.S.)
19
BBC (Firm)
14
Off the Fence Productions
10
BBC Worldwide Learning
7
Clokey Productions, Inc. dba San Luis Video Publishing (Firm)
3
Cable News Network
1
Cerebellum Corporation
1
Ciné Fête
1
Film Ideas (Firm)
1
Green Planet Films
1
Intelligence² (U.S.)
1
Network Ireland Television
1
NewsHour Productions
1
Parthenon Entertainment (Firm)
1
ZED (Firm)
1