Columbia subject headings:
Architecture--Germany--Ludwigshafen an Rhein (Landkreis)
Historic buildings--Germany--Ludwigshafen am Rhein (Landkreis)
Ludwigshafen am Rhein (Germany : Landkreis)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Germany--Ludwigshafen am Rhein (Landkreis)
Historic buildings--Germany--Ludwigshafen am Rhein (Landkreis)
Ludwigshafen am Rhein (Germany : Landkreis)--Description and travel.
Princeton subject headings:
Architecture--Germany--Ludwigshafen (Landkreis).
Guidebooks.
Historic buildings--Germany--Ludwigshafen (Landkreis).
Historic sites--Germany--Ludwigshafen (Landkreis).
Ludwigshafen (Germany : Landkreis)--Description and travel--Guidebooks.