Columbia subject headings:
Harvard subject headings:
Czechoslovakia--Foreign relations--Liechtenstein--Congresses.
Czechoslovakia--History--20th century--Congresses.
Czechoslovakia--History--21st century--Congresses.
Liechtenstein, House of--Congresses.
Liechtenstein--Foreign relations--Czechoslovakia--Congresses.
Liechtenstein--History--20th century--Congresses.
Liechtenstein--History--21st century--Congresses.
Princeton subject headings:
Czechoslovakia--Foreign relations--Liechtenstein--History--Congresses.
Liechtenstein, House of--History--20th century--Congresses.
Liechtenstein--Foreign relations--Czechoslovakia--History--Congresses.