Columbia subject headings:
Arabic letters--Early works to 1800.
Commercial correspondence, Arabic--Early works to 1800.
Manuscripts, Arabic--Austria--Vienna--Catalogs.
Österreichische Nationalbibliothek--Catalogs.
Harvard subject headings:
Arabic letters
Commercial correspondence, Arabic--Early works to 1800.
Österreichische Nationalbibliothek--Catalogs.
Princeton subject headings:
Arabic letters--Early works to 1800.
Commercial correspondence--Early works to 1800.
Manuscripts, Arabic--Austria--Vienna--Catalogs.
Österreichische Nationalbibliothek--Catalogs.