Columbia subject headings:
Austria--Foreign relations--20th century.
Austria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Austria.
Soviet Union--Foreign relations.
Harvard subject headings:
Austria--Foreign relations--20th century.
Austria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Austria.
Princeton subject headings:
Austria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Austria.