Columbia subject headings:
Architecture--France--Paris--History--20th century--Exhibitions.
Buildings, Reinforced concrete--France--Paris--Exhibitions.
Harvard subject headings:
Architecture, Modern--France--Paris--Exhibitions.
Architecture--France--Paris--History--Exhibitions.
Buildings, Reinforced concrete--France--Paris--Exhibitions.
Concrete construction--France--Paris--Exhibitions.
Paris (France)--Buildings, structures, etc.--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--France--Paris--Exhibitions.
Buildings, Reinforced concrete--France--Paris--Exhibitions.