Columbia subject headings:
Austria--Foreign relations--20th century.
Austria--Foreign relations--Czechoslovakia.
Czechoslovakia--Foreign relations--Austria.
Harvard subject headings:
Austria--Foreign relations--20th century.
Austria--Foreign relations--Czechoslovakia.
Czechoslovakia--Foreign relations--Austria.
Princeton subject headings:
Austria--Foreign relations--20th century.
Austria--Foreign relations--Czechoslovakia.
Czechoslovakia--Foreign relations--Austria.