Columbia subject headings:
Hungary--History--Sources.
Transylvania (Romania)--History--Sources.
Harvard subject headings:
Hungary--History--16th century--Sources.
Hungary--Politics and government--16th century--Sources.
Transylvania (Romania)--History--16th century--Sources.
Transylvania (Romania)--Politics and government--16th century--Sources.
Princeton subject headings:
Hungary--History--Sources.
Transylvania (Romania)--History--Sources.