Columbia subject headings:
Bridges--Colombia--Cauca River Valley.
Building, Brick.
Popayán (Colombia)--Buildings, structures, etc.
Harvard subject headings:
Arch bridges--Colombia--Cauca River Valley.
Brick bridges--Colombia--Cauca River Valley.
Bridges--Colombia--Cauca River Valley.
Building, Brick.
Popayán (Colombia)--Buildings, structures, etc.
Princeton subject headings:
Bridges--Colombia--Cauca River Valley.
Building, Brick.
Popayán (Colombia)--Buildings, structures, etc.