Columbia subject headings:
Feudal law--Germany--Rhineland-Palatinate.
Feudalism--Germany--Rhineland-Palatinate.
Harvard subject headings:
Feudal law--Germany--Rhineland-Palatinate.
Feudalism--Germany--Rhineland-Palatinate.
Princeton subject headings:
Feudal law--Germany, West--Rhineland-Palatinate.
Feudalism--Germany, West--Rhineland-Palatinate.