Columbia subject headings:
Graffiti--History--Congresses.
Signs and symbols--Congresses.
Writing--Egypt--History--Congresses.
Writing--History--Congresses.
Harvard subject headings:
Inscriptions, Egyptian--History--Congresses.
Inscriptions--History--Congresses.
Picture-writing--History--Congresses.
Signs and symbols--History--Congresses.
Writing--History--Congresses.
Princeton subject headings: