Columbia subject headings:
Architectural drawing--Austria--19th century--Catalogs.
Architectural drawing--Austria--20th century--Catalogs.
Architecture--Austria--History--19th century--Designs and plans--Catalogs.
Architecture--Austria--History--20th century--Designs and plans--Catalogs.
Wagner, Otto, 1841-1918--Catalogs.
Harvard subject headings:
Architectural drawing--19th century--Austria--Catalogs.
Architectural drawing--20th century--Austria--Catalogs.
Architectural drawing--Austria--19th century--Catalogs.
Architectural drawing--Austria--20th century--Catalogs.
Architecture, Modern--19th century--Austria--Designs and plans--Catalogs.
Architecture, Modern--20th century--Austria--Designs and plans--Catalogs.
Architecture--Austria--History--19th century--Designs and plans--Catalogs.
Architecture--Austria--History--20th century--Designs and plans--Catalogs.
Wagner, Otto, 1841-1918--Catalogs.
Princeton subject headings:
Architectural drawing--Austria--19th century--Catalogs.
Architectural drawing--Austria--20th century--Catalogs.
Architecture--Austria--19th century--Designs and plans--Catalogs.
Architecture--Austria--20th century--Designs and plans--Catalogs.
Catalogs.
Wagner, Otto, 1841-1918--Catalogs.