Columbia subject headings:
Atrocities--Poland--Białystok (Voivodeship)--History--20th century.
Poland--Relations--Soviet Union.
Political persecution--Poland--Białystok (Voivodeship)--History--20th century.
Soviet Union--Politics and government--1936-1953.
Soviet Union--Relations--Poland.
Harvard subject headings:
Military courts--Poland--History--20th century.
Political persecution--Poland--Białystok Region--History--20th century.
Trials (Political crimes and offenses)--Poland--Białystok Region--History--Sources.
Princeton subject headings: