Columbia subject headings:
Harvard subject headings:
Civilization, Greco-Roman--Congresses
Greece--Emigration and immigration--Congresses.
Minorities--Greece--Congresses.
Minorities--Rome--Congresses.
Rome--Emigration and immigration--Congresses.
Princeton subject headings:
Civilization, Greco-Roman.
Greece--Emigration and immigration.
Minorities--Greece.
Minorities--Rome.
Rome--Emigration and immigration.