Columbia subject headings:
Archives--Austria--Directories.
Harvard subject headings:
Archives--Austria--Directories.
Princeton subject headings:
Archives--Austria--Directories.
Austria--History--20th century--Archival resources.
Austria--History--20th century--Library resources.
History, Modern--20th century--Archival resources--Austria.
History, Modern--20th century--Library resources--Austria.
Libraries--Austria--Directories.