Columbia subject headings:
Letter writing, Arabic--Germany--Heidelberg--Catalogs.
Manuscripts, Arabic--Germany--Heidelberg--Catalogs.
Universität Heidelberg. Institut für Papyrologie--Catalogs.
Harvard subject headings:
Letter writing, Arabic--Germany--Heidelberg--Catalogs.
Manuscripts, Arabic--Germany--Heidelberg--Catalogs.
Universität Heidelberg. Institut für Papyrologie--Catalogs.
Princeton subject headings: