Columbia subject headings:
Economic security--Soviet Union--Sources.
Political persecution--Soviet Union--Sources.
Soviet Union--History--1917-1936--Sources.
Harvard subject headings:
Sabotage in the workplace--Soviet Union--History--Sources.
Soviet Union--Politics and government--1917-1936.
T͡SK KPSS. Politbi͡uro--Sources.
Princeton subject headings:
Sabotage in the workplace--Soviet Union--History--Sources.
Soviet Union--Politics and government--1917-1936.
T︠S︡K KPSS. Politbi︠u︡ro--Sources.