Columbia subject headings:
Communism--Greece--Congresses.
Kommounistikon Komma tēs Hellados--Congresses.
Kommounistikon Komma tēs Hellados--History--20th century.
Harvard subject headings:
Communism--Greece--Congresses.
Kommounistikon Komma tēs Hellados--Congresses.
Kommounistikon Komma tēs Hellados--History--20th century.
Princeton subject headings:
Communism--Greece--Congresses.
Kommounistiko Komma Helladas--Congresses.
Kommounistiko Komma Helladas--History--20th century.