Columbia subject headings:
Architects--Luxembourg.
Architecture--Luxembourg--History--20th century.
Luxembourg--Buildings, structures, etc.
Harvard subject headings:
Architects--Luxembourg.
Architecture, Modern--20th century--Luxembourg.
Architecture--Luxembourg--History--20th century.
Luxembourg--Description and travel.
Princeton subject headings:
Architects--Luxembourg.
Architecture, Modern--20th century--Luxembourg.
Luxembourg--Buildings, structures, etc.