Columbia subject headings:
Harvard subject headings:
Austria--Foreign relations--1867-1918.
Austria--Foreign relations--Balkan Peninsula.
Austria--Foreign relations--Turkey.
Balkan Peninsula--Foreign relations--Austria.
Macedonia--History--1878-1912.
Macedonian question.
Turkey--Foreign relations--Austria.
Princeton subject headings:
Austria--Foreign relations--1867-1918.
Austria--Relations--Macedonia.
Macedonia--History--1878-1912.
Macedonia--Relations--Austria.
Macedonian question.