Columbia subject headings:
Architecture, Modern--20th century.
Architecture--Mexico--Mexico City.
Harvard subject headings:
Architecture, Modern--21st century
Architecture--Mexico--Mexico City--History--20th century.
Architecture--Mexico--Mexico City--History.
Architecture--Mexico--Mexico City.
Centro Histórico de la Ciudad de México (Mexico City, Mexico)
Centro Histórico de la Ciudad de México (Mexico City, Mexico)
Mexico City (Mexico)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Modern--20th century.
Architecture--Mexico--Mexico City.