Columbia subject headings:
Harvard subject headings:
Industrial archaeology--Germany--Rhineland-Palatinate.
Industrial buildings--Germany--Rhineland-Palatinate.
Landscape archaeology--Germany--Rhineland-Palatinate.
Mines and mineral resources--Germany--Rhineland-Palatinate--History.
Rhineland-Palatinate (Germany)--Economic conditions.
Princeton subject headings:
Industrial archaeology--Germany--Rhineland-Palatinate.
Industrial buildings--Germany--Rhineland-Palatinate.
Landscape archaeology--Germany--Rhineland-Palatinate.
Mines and mineral resources--Germany--Rhineland-Palatinate--History.
Rhineland-Palatinate (Germany)--Economic conditions.