Columbia subject headings:
Harvard subject headings:
Sponge divers--Aegean Sea--History.
Sponge divers--Mediterranean Sea--History.
Sponge fisheries--Aegean Sea--History.
Sponge fisheries--Mediterranean Sea--History.
Princeton subject headings:
Sponge divers--Aegean Sea--History.
Sponge divers--Mediterranean Sea--History.
Sponge fisheries--Aegean Sea--History.
Sponge fisheries--Mediterranean Sea--History.