Columbia subject headings:
Communism--Ireland--History.
Communist International--History.
Communist Party of Ireland--History.
Ireland--Foreign relations--Soviet Union.
Ireland--Politics and government--1922-1949.
Sinn Fein--History.
Soviet Union--Foreign relations--Ireland.
Harvard subject headings:
Communism--Ireland--History.
Communist International--Ireland--History.
Communist Party of Ireland--History.
Ireland--Foreign relations--Soviet Union.
Ireland--Politics and government--1922-1949.
Sinn Fein--History.
Soviet Union--Foreign relations--Ireland.
Princeton subject headings:
Communism--Ireland--History.
Ireland--Foreign relations--Soviet Union.
Ireland--Politics and government--1922-1949.
Soviet Union--Foreign relations--Ireland.