Columbia subject headings:
Germany--History--1618-1648.
Peace of Westphalia--Congresses.
Thirty Years' War, 1618-1648--Congresses.
Harvard subject headings:
Germany--History--1618-1648.
Peace of Westphalia--Congresses.
Thirty Years' War, 1618-1648--Congresses.
Princeton subject headings:
Germany--History--1618-1648.
Peace of Westphalia--Congresses.
Thirty Years' War, 1618-1648--Congresses.