Columbia subject headings:
Rudolf, von Ems, -approximately 1254--Political and social views.
Rudolf, von Ems, -approximately 1254. Weltchronik.
Harvard subject headings:
Rudolf, von Ems, -approximately 1254--Political and social views.
Rudolf, von Ems, -approximately 1254. Weltchronik.
Princeton subject headings:
Rudolf, von Ems, -approximately 1254--Political and social views.
Rudolf, von Ems, -approximately 1254. Weltchronik.