Columbia subject headings:
Genoa (Italy)--History--To 1339.
Pisa (Italy)--History.
Harvard subject headings:
Genoa (Italy)--History--To 1339.
Meloria, Battle of, Italy, 1284.
Pisa (Italy)--History.
Princeton subject headings:
Battles--Italy--Meloria--History.
Genoa (Italy)--History--1339-1528.
Genoa (Italy)--History--To 1339.
Mediterranean Region--History.
Pisa (Italy)--History--13th century.
Pisa (Italy)--History--14th century.