- Balkan Section1
- Balogh, Eva S.1
- Balzak, S. S.1
- Belügyminisztérium Központi Irattára1
- Blau, Joseph L.1
- Boldizsár, Iván1
- British Broadcasting Corporation, Written Archive Centre1
- Buber-Neumann, Margarete1
- Bucar, Annabelle1
- Bulgarian Unit1
- Chiaureli, Mikhail1
- Clissold, Stephen1
- Cole, George Douglas Howard1
- Communist International (Comintern)1
- Counts, George S.1
- Czapski, Józef1
- Dallin, David J.1
- Duranty, Walter1
- Ely, Louis Brainerd1
- Engels, Friedrich1