Columbia subject headings:
Harvard subject headings:
Fifteen Years' War, 1591-1606--Romania--Transylvania.
Hungary--Foreign relations--Romania--Transylvania.
Transylvania (Romania)--Foreign relations--Hungary.
Transylvania (Romania)--Foreign relations--Turkey.
Transylvania (Romania)--History--16th century.
Turkey--Foreign relations--Romania--Transylvania.
Princeton subject headings:
Transylvania (Romania)--History--16th century.