Columbia subject headings:
Austria--History--Ferdinand II, 1619-1637.
Ferdinand III, Holy Roman Emperor, 1608-1657.
Holy Roman Empire--History--Ferdinand II, 1619-1637.
Holy Roman Empire. Kurfürstentag (1636 : Regensburg, Germany)
Harvard subject headings:
Austria--History--Ferdinand II, 1619-1637
Ferdinand III, Holy Roman Emperor, 1608-1657.
Holy Roman Empire--History--Ferdinand II, 1619-1637.
Holy Roman Empire. Kurfürstentag (1636 : Regensburg, Germany)
Princeton subject headings:
Austria--History--Ferdinand II, 1619-1637.
Ferdinand III, Holy Roman Emperor, 1608-1657.
Holy Roman Empire--History--Ferdinand II, 1619-1637.
Holy Roman Empire. Kurfürstentag, 1636.