Columbia subject headings:
Eastern question (Balkan)
Russo-Turkish War, 1877-1878.
Serbia--Foreign relations.
Serbo-Turkish War, 1876.
Harvard subject headings:
Eastern question (Balkan)
Russo-Turkish War, 1877-1878.
Serbia--Foreign relations.
Serbo-Turkish War, 1876.
Princeton subject headings:
Eastern question (Balkan)
Russo-Turkish War, 1877-1878.
Serbia--Foreign relations.
Serbo-Turkish War, 1876.