Columbia subject headings:
Plazas--Mexico--History.
Plazas--Mexico--Pictorial works.
Plazas--Mexico.
Harvard subject headings:
Plazas--Mexico--History.
Plazas--Mexico--Pictorial works.
Plazas--Mexico.
Princeton subject headings:
Plazas--Mexico--History.
Plazas--Mexico--Pictorial works.
Plazas--Mexico.