Columbia subject headings:
Architecture--Spain--Bilbao.
City planning--Spain--Bilbao.
Geometry, Riemannian.
Urbanization--Spain--Bilbao.
Harvard subject headings:
Architecture--Spain--Bilbao.
City planning--Spain--Bilbao.
Geometry, Riemannian.
Urbanization--Spain--Bilbao.
Princeton subject headings:
Architecture--Spain--Bilbao.
City planning--Spain--Bilbao.
Geometry, Riemannian.
Urbanization--Spain--Bilbao.