Columbia subject headings:
Harvard subject headings:
Heidelberger Schloss (Heidelberg, Germany)--History.
Wine barrels--Design and construction--History.
Wine barrels--Economic aspects--Germany--Heidelberg.
Wine barrels--Germany--Heidelberg--History.
Wine barrels--Social aspects--Germany--Heidelberg.
Princeton subject headings:
Heidelberger Schloss (Heidelberg, Germany)--History.
Wine and wine making--Germany--Heidelberg--History.
Wine barrels--Germany--Heidelberg--History.