Columbia subject headings:
Liège (Belgium : Province)--Historical geography.
Luxembourg (Belgium)--Historical geography.
Namur (Belgium : Province)--Historical geography.
Harvard subject headings:
Liège (Belgium : Province)--Historical geography.
Luxembourg (Belgium)--Historical geography.
Luxembourg--History--Maps.
Namur (Belgium : Province)--Historical geography.
Princeton subject headings:
Liège (Belgium : Province)--Historical geography.
Luxembourg (Belgium)--Historical geography.
Namur (Belgium : Province)--Historical geography.