Columbia subject headings:
Architecture--Finland--History--20th century.
Sonck, Lars Eliel, 1870-1956.
Harvard subject headings:
Architects--Finland.
Architecture, Modern--20th century--Finland.
Sonck, Lars Eliel, 1870-1956.
Princeton subject headings:
Architecture, Modern--20th century--Finland.
Sonck, Lars Eliel, 1870-1956.