Columbia subject headings:
Assassination--Soviet Union--History.
Russia--History--Nicholas II, 1894-1917.
Secret service--Soviet Union--History.
Subversive activities--Soviet Union--History.
Harvard subject headings:
Assassination--Soviet Union--History.
Russia--History--Nicholas II, 1894-1917.
Secret service--Soviet Union--History
Subversive activities--Soviet Union--History.
Princeton subject headings:
Russia--History--Nicholas II, 1894-1917.
Russia--Politics and government--1894-1917.
Russia. Okhrannyi︠a︡ otdeli︠e︡nīi︠a︡.
Secret service--Russia--History.