Columbia subject headings:
Interpersonal relations--Mediterranean Region--History--Congresses.
Mediterranean Region--Social conditions--Congresses.
Slavery--History--Congresses.
Social structure--Mediterranean Region--History--Congresses.
Harvard subject headings:
Interpersonal relations--Mediterranean Region--History--Congresses.
Mediterranean Region--Social conditions--Congresses.
Slavery--History--Congresses.
Social structure--Mediterranean Region--History--Congresses.
Princeton subject headings:
Interpersonal relations--Mediterranean Region--History--Congresses.
Mediterranean Region--Social conditions--Congresses.
Slavery--History--Congresses.
Social structure--Mediterranean Region--History--Congresses.