- Radio Free Europe/Radio Liberty Research Institute (RFE/RL Research Institute)4,125
- Samizdat Archives22
- Radio Free Europe/Radio Liberty, Inc - Research Institute21
- Csákó, Mihály12
- Soviet Red Archives10
- Samizdat Archives of Radio Free Europe9
- Open Media Research Institute8
- United States. Department of State8
- United States. Congress. House. Committee on Foreign Affairs. Subcommittee on Europe and the Middle East7
- Pastor, Peter6
- Visnews6
- UPTIN5
- Laber, Jeri4
- Lanzmann, Claude4
- Laqueur, Walter4
- Pallai, Péter4
- Pincher, Chapman4
- United States. Congress. House. Committee on Foreign Affairs4
- Broomfield, Nick3
- Conquest, Robert3