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Author/Creator
- SpringerLink (Online service)204
- Infobase, film distributor121
- PBS (Firm)20
- BBC Worldwide Learning (Firm)11
- Green Planet Films (Firm)11
- Green Interview (Firm)10
- Film Ideas (Firm)7
- Films for the Humanities & Sciences (Firm)7
- Infobase7
- United States. Congress. House. Committee on Science. Subcommittee on Environment, Technology, and Standards6
- Albatross World Sales (Firm)5
- CNN (Firm)5
- Salomons, Wim5
- Collective Eye Films (Firm)4
- Förstner, Ulrich4
- Michael Conti Productions (Firm)4
- Roberts, Paul4
- Stevenson, L. Harold, 1940-4
- United States4
- United States. Department of State4