Columbia subject headings:
Architecture--Austria--History--19th century.
Architecture--Austria--History--20th century.
Baumann, Ludwig, 1853-1936--Criticism and interpretation.
Harvard subject headings:
Architecture, Modern--20th century--Austria.
Architecture--Austria--History--19th century.
Baumann, Ludwig, 1853-1936--Criticism and interpretation.
Princeton subject headings:
Architecture--Austria--19th century.
Architecture--Austria--History--20th century.
Baumann, Ludwig, 1853-1936--Criticism and interpretation.