- Aczél, Tamás1
- Adamovich, Anton1
- Alfred A. Reisch1
- Allegro, John Marco1
- Alley, Rewi1
- Amrine, Michael1
- Analytic Research Department1
- Andreev, Ivan Dmitrievich1
- Aptheker, Herbert1
- Areshian, Salomeia Grigorʹevna1
- Arkhiptsev, Fedor Timofeevich1
- Armstrong, Terence E.1
- Aron, Raymond1
- Arsenʹev, Nikolai Sergeevich1
- Avtorkhanov, Abdurakhman1
- Azizbekova, P. A.1
- Babushkin, Aleksei Nikitich1
- Bahr, Ernst1
- Balkan Section1
- Balogh, Eva S.2