Columbia subject headings:
Diplomacy--History--17th century.
Peace of Westphalia
Thirty Years' War, 1618-1648--Diplomatic history.
Thirty Years' War, 1618-1648--Peace.
Harvard subject headings:
Diplomacy--History--17th century--Congresses.
Peace of Westphalia--Congresses.
Thirty Years' War, 1618-1648--Diplomatic history--Congresses.
Thirty Years' War, 1618-1648--Peace--Congresses.
Princeton subject headings:
Diplomacy--History--17th century--Congresses.
Peace of Westphalia--Congresses.
Thirty Years' War, 1618-1648--Diplomatic history--Congresses.
Thirty Years' War, 1618-1648--Peace--Congresses.