Columbia subject headings:
Austria--Foreign relations--Serbia.
Eastern question (Balkan)
Serbia--Foreign relations--Austria.
Yugoslavs.
Harvard subject headings:
Austria--Foreign relations--Serbia.
Austria--Foreign relations--Yugoslavia--Serbia.
Eastern question (Balkan)
Serbia--Foreign relations--Austria.
Yugoslavs
Princeton subject headings:
Austria--Foreign relations--Yugoslavia--Serbia.
Eastern question (Balkan)
Serbia--Foreign relations--Austria.
Yugoslavs.