Columbia subject headings:
Greece--Rural conditions--Congresses.
Greece--Social conditions--Congresses.
Rome--Rural conditions--Congresses.
Rome--Social conditions--Congresses.
Harvard subject headings:
Greece--Rural conditions--Congresses.
Greece--Social conditions--Congresses.
Rome--Rural conditions--Congresses.
Rome--Social conditions--Congresses.
Princeton subject headings:
Greece--Rural conditions--Congresses.
Greece--Social conditions--Congresses.
Rome--Rural conditions--Congresses.
Rome--Social conditions--Congresses.