Columbia subject headings:
Harvard subject headings:
Christian union--History.
Germany--Church history--16th century.
Holy Roman Empire--Church history--16th century--Sources.
Holy Roman Empire. Reichstag (1530 : Augsburg, Germany)
Holy Roman Empire. Reichstag.
Princeton subject headings:
Christian union--History.
Holy Roman Empire. Reichstag
Holy Roman Empire. Reichstag (1530 : Augsburg, Germany)