Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Europe--Congresses
Food habits--Europe--History--Congresses.
Food supply--Europe--History--Congresses.
Food supply--Germany--History--Congresses.
Water-supply--Europe--History--Congresses.
Water-supply--Germany--History--Congresses.
Princeton subject headings:
Archaeology and history.
Food industry and trade.
Food supply--History--Modern period, 1500-.
Food supply--History--To 1500.
Middle Ages.