- Macedonian question (3)
- Austria--Foreign relations--1867-1918 (1)
- Austria--Foreign relations--Balkan Peninsula (1)
- Austria--Foreign relations--Turkey (1)
- Balkan Peninsula--Foreign relations--Austria (1)
- Bulgaria--Relations--Macedonia (1)
- Bŭlgarska komunisticheska partii︠a︡ (1)
- Macedonia--History--1878-1912 (1)
- Macedonia--Relations--Bulgaria (1)
- Turkey--Foreign relations--Austria (1)