Columbia subject headings:
Ferdinand II, Holy Roman Emperor, 1578-1637.
Germany--History--1618-1648.
Thirty Years' War, 1618-1648.
Wallenstein, Albrecht Wenzel Eusebius von, Herzog von Friedland, 1583-1634.
Harvard subject headings:
Wallenstein, Albrecht Wenzel Eusebius von, Herzog von Friedland, 1583-1634.
Princeton subject headings: