Columbia subject headings:
Harvard subject headings:
Charles V, Holy Roman Emperor, 1500-1558--Correspondence.
Günther XLI, Graf von Schwarzburg, 1529-1583--Correspondence.
Holy Roman Empire--History--Charles V, 1519-1556--Sources.
Netherlands--History--Eighty Years' War, 1568-1648--Sources.
Philip II, King of Spain, 1527-1598--Correspondence.
Spain--History--Philip II, 1556-1598--Sources.
Princeton subject headings:
Günther XLI, Graf von Schwarzburg, 1529-1583--Correspondence.
Netherlands--History--Sources.