Columbia subject headings:
Austria--Foreign relations--Germany.
Eastern question (Balkan)
Europe--Politics and government--20th centuries.
Europe--Politics and government--20th century.
Germany--Foreign relations--20th century.
Germany--Foreign relations--Austria.
Harvard subject headings:
Austria--Foreign relations--Germany
Eastern question (Balkan)
Europe--Politics and government--20th century.
Germany--Foreign relations--20th century.
Germany--Foreign relations--Austria.
Princeton subject headings:
Austria--Foreign relations--Germany.
Eastern question (Balkan)
Europe--Politics and government--20th century.
Germany--Foreign relations--20th century.
Germany--Foreign relations--Austria.