Columbia subject headings:
Black Sea Region--History--Congresses.
Genoa (Italy)--Colonies--Congresses.
Genoa (Italy)--History--1339-1528--Congresses.
Genoa (Italy)--History--To 1339--Congresses.
Harvard subject headings:
Black Sea Coast (Romania)--History--Congresses.
Genoa (Italy)--Colonies--Congresses.
Genoa (Italy)--History--1339-1528--Congresses.
Genoa (Italy)--History--To 1339--Congresses.
Princeton subject headings:
Black Sea Coast (Romania)--History--Congresses.
Genoa (Italy)--Colonies--Congresses.
Genoa (Italy)--History--1339-1528--Congresses.
Genoa (Italy)--History--To 1339--Congresses.