Columbia subject headings:
Architecture--Austria--Vienna--History--19th century--Catalogs.
Architecture--Austria--Vienna--History--20th century--Catalogs.
Wagner, Otto, 1841-1918--Catalogs.
Harvard subject headings:
Architects--Austria.
Architecture--Austria--Vienna--19th century.
Architecture--Austria--Vienna--20th century.
Wagner, Otto, 1841-1918--Criticism and interpretation.
Princeton subject headings:
Architects--Austria.
Architecture--Austria--Vienna--19th century.
Architecture--Austria--Vienna--20th century.
Wagner, Otto, 1841-1918--Criticism and interpretation.