Columbia subject headings:
Harvard subject headings:
Lauffen am Neckar (Germany)--Genealogy--Congresses.
Lauffen am Neckar (Germany)--History--Congresses.
Lauffen family--Congresses.
Nobility--Germany--Lauffen am Neckar--Biography--Congresses.
Princeton subject headings:
Neckar River Valley (Germany)--History--Congresses.
Nobility--Germany--Neckar River Valley--History--Congresses.