Columbia subject headings:
Holy Roman Empire--Civilization.
Holy Roman Empire--Historiography.
Holy Roman Empire--History--Sources.
Müller-Mertens, Eckhard.
Harvard subject headings:
Holy Roman Empire--Civilization.
Holy Roman Empire--Historiography.
Holy Roman Empire--History--Sources.
Müller-Mertens, Eckhard.
Princeton subject headings:
Holy Roman Empire--Civilization.
Holy Roman Empire--Historiography.
Holy Roman Empire--History--Sources.
Müller-Mertens, Eckhard.