Columbia subject headings:
Harvard subject headings:
Austria--Foreign relations--1918-1938.
Austria--Foreign relations--Soviet Union.
Austria--History--1918-1938.
Austria--Relations--Soviet Union.
Soviet Union--Foreign relations--1917-1945.
Soviet Union--Foreign relations--Austria.
Soviet Union--History--1917-1936.
Soviet Union--Relations--Austria.
Princeton subject headings:
Austria--Relations--Soviet Union.
Soviet Union--Relations--Austria.