Columbia subject headings:
Harvard subject headings:
Communism--Europe, Central--History--20th century--Congresses.
Communism--Europe, Eastern--History--20th century--Congresses.
Europe, Central--History--20th century--Congresses.
Europe, Eastern--History--20th century--Congresses.
Political prisoners--Europe, Central--History--20th century--Congresses.
Political prisoners--Europe, Eastern--History--20th century--Congresses.
Political prisoners--Family relationships--Europe, Central--Congresses.
Political prisoners--Family relationships--Europe, Eastern--Congresses.
Prisoners' families--Europe, Central--History--20th century--Congresses.
Prisoners' families--Europe, Eastern--History--20th century--Congresses.
Social integration--Europe, Central--History--20th century--Congresses.
Social integration--Europe, Eastern--History--20th century--Congresses.
Princeton subject headings:
Communism--Europe, Central--History--20th century--Congresses.
Communism--Europe, Eastern--History--20th century--Congresses.
Europe, Central--History--20th century--Congresses.
Europe, Eastern--History--20th century--Congresses.
Political prisoners--Europe, Central--History--20th century--Congresses.
Political prisoners--Europe, Eastern--History--20th century--Congresses.
Political prisoners--Family relationships--Europe, Central--History--20th century--Congresses.
Political prisoners--Family relationships--Europe, Eastern--History--20th century--Congresses.
Prisoners' families--Europe, Central--History--20th century--Congresses.
Prisoners' families--Europe, Eastern--History--20th century--Congresses.
Social integration--Europe, Central--History--20th century--Congresses.
Social integration--Europe, Eastern--History--20th century--Congresses.