Columbia subject headings:
Austria--Ferdinand I, 1521-1564.
Austria--Politics and government--16th century.
Harvard subject headings:
Austria--Foreign relations--1519-1740.
Austria--History--Ferdinand I, 1521-1564
Austria--Politics and government--16th century.
Princeton subject headings:
Austria--Ferdinand I, 1521-1564.
Austria--Politics and government--16th century.