Columbia subject headings:
Perco, Rudolf, 1884-1942.
Harvard subject headings:
Architects--Austria.
Architectural drawing--Austria.
Architecture--Austria--Vienna--20th century.
Perco, Rudolf, 1884-1942.
Vienna (Austria)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Austria--Vienna.
Perco, Rudolf, 1884-1942.