Columbia subject headings:
Holy Roman Empire--Foreign relations--Switzerland.
Holy Roman Empire--History--Charles V, 1519-1556.
Switzerland--Foreign relations--Holy Roman Empire.
Switzerland--History--1032-1499.
Switzerland--History--1499-1648.
Harvard subject headings:
Holy Roman Empire--History--Charles V, 1519-1556.
Holy Roman Empire--Relations--Switzerland.
Switzerland--History--1499-1648.
Switzerland--Relations--Holy Roman Empire.
Princeton subject headings:
Holy Roman Empire--Foreign relations--Switzerland.
Holy Roman Empire--History--Charles V, 1519-1556.
Switzerland--Foreign relations--Holy Roman Empire.
Switzerland--History--1032-1499.
Switzerland--History--1499-1648.