Columbia subject headings:
Harvard subject headings:
Bread industry--Greece--History--Congresses.
Bread--Greece--History--Congresses.
Grain--Milling--Greece--History--Congresses.
Mills and mill-work--Greece--History--Congresses.
Wheat--Greece--History--Congresses.
Princeton subject headings:
Bread industry--Greece--History--Congresses.
Bread--Greece--History--Congresses.
Grain--Milling--Greece--History--Congresses.
Mills and mill-work--Greece--History--Congresses.
Wheat--Greece--History--Congresses.