Columbia subject headings:
Salt industry and trade--Greece--History.
Salt--History.
Harvard subject headings:
Greece--Antiquities.
Greece--Commerce--History.
Mediterranean Region--Antiquities.
Mediterranean Region--Commerce--History.
Salt industry and trade--Greece--History.
Salt industry and trade--Mediterranean Region--History.
Salt mines and mining--Greece--History.
Salt mines and mining--Mediterranean Region--History.
Princeton subject headings:
Salt industry and trade--Greece--History.
Salt--History.