Columbia subject headings:
Harvard subject headings:
Friedrich I, Duke of Württemberg, 1557-1608.
Württemberg (Germany)--Kings and rulers--Biography.
Württemberg (Germany)--History.
Princeton subject headings:
Friedrich I, Duke of Württemberg, 1557-1608.
Württemberg (Germany)--History--16th century.
Württemberg (Germany)--Kings and rulers--Biography.