Columbia subject headings:
Cities and towns, Ancient--Portugal.
Cities and towns, Ancient--Spain.
Urbanization--Portugal.
Urbanization--Spain.
Harvard subject headings:
Cities and towns, Ancient--Portugal--Congresses.
Cities and towns, Ancient--Portugal.
Cities and towns, Ancient--Spain--Congresses.
Cities and towns, Ancient--Spain.
Portugal--Antiquities--Congresses.
Spain--Antiquities--Congresses.
Urbanization--Portugal--Congresses.
Urbanization--Portugal.
Urbanization--Spain--Congresses.
Urbanization--Spain.
Princeton subject headings:
Cities and towns--Portugal--History.
Cities and towns--Spain--History.
Urbanization--Portugal--History.
Urbanization--Spain--History.