Columbia subject headings:
Communism--Forecasting.
Communism--History--20th century.
Greece--History--20th century.
Harvard subject headings:
Communism--Forecasting.
Communism--History--20th century
Greece--History--20th century.
Princeton subject headings:
Communism--Forecasting.
Communism--History--20th century.
Greece--History--20th century.