Columbia subject headings:
Harvard subject headings:
Mansfeld, Ernst, Graf von, 1585-1626.
Ostfriesland (Germany)--History.
Thirty Years' War, 1618-1648--Battlefields--Germany--Altenoythe--History.
Princeton subject headings:
Mansfeld, Ernst, graf von, 1585-1626.
Ostfriesland (Germany)--History.
Thirty Years' War, 1618-1648--Battlefields--Germany--Altenoythe--History.