Columbia subject headings:
Harvard subject headings:
Bethlen, Gábor, Prince of Transylvania, 1580-1629.
Transylvania (Romania)--History.
Transylvania (Romania)--Kings and rulers--Biography.
Princeton subject headings:
Bethlen, Gábor, Prince of Transylvania, 1580-1629.
Transylvania (Romania)--History.
Transylvania (Romania)--Kings and rulers--Biography.