Columbia subject headings:
Shīʻah--Controversial literature.
Shīʻah--Relations--Sunnites.
Shīʻah--Rituals--Miscellanea.
Sunnites--Relations--Shīʻah.
Harvard subject headings:
Princeton subject headings:
Islam--Customs and practices.
Shīʻah--Controversial literature.
Shīʻah--Customs and practices.
Shīʻah--Relations--Sunnites.
Shīʻah--Rituals--Miscellanea.
Sunnites--Relations--Shīʻah.