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- SpringerLink (Online service)1,715
- Infobase, film distributor436
- PBS (Firm)65
- BBC (Firm)45
- BBC Worldwide Learning (Firm)40
- Cerebellum Corporation (Firm)30
- Green Planet Films (Firm)27
- Lichtfouse, Eric25
- United States. National Aeronautics and Space Administration22
- Varma, Ajit19
- Arber, W.18
- Henle, W.18
- Hofschneider, P. H.18
- Koprowski, H.18
- Maaløe, O.18
- Schweiger, H. G.18
- Vogt, P. K.18
- Stewart, B. A.17
- Kole, Chittaranjan16
- Clokey Productions, Inc. dba San Luis Video Publishing (Firm)15