Columbia subject headings:
Harvard subject headings:
Caliphs--Encyclopedias--Dictionaries.
Hadith
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661--Encyclopedias--Dictionaries.
Princeton subject headings:
Encyclopedias.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661--Encyclopedias.
ʻAlī ibn Abī Ṭālib, Caliph, approximately 600-661--Hadith--Encyclopedias.