- Great Britain, Foreign and Commonwealth Office1
- Guins, George Constantine1
- Günther, Władysław1
- Haas, Ernst B.1
- Heilbrunn, Otto1
- Historical Archives of the Hungarian State Security1
- Hoffman, Jerzy1
- Howell, Edgar M.1
- Information Services Department1
- Institut etnografii imeni N. N. Miklukho-Maklaia1
- Janus, Józef1
- Joll, James1
- Jong, L. de1
- Judit, Miklósy1
- Kamenetsky, Ihor1
- Karabasz, Kazimierz1
- Karácsonyi, Béla1
- Kaufmann, William W.1
- Kemény, István1
- Kennan, George F.1