Columbia subject headings:
Assassination--Islamic Empire--History.
Islamic Empire--History.
Islamic Empire--Kings and rulers.
Political crimes and offenses--Islamic Empire--History.
Political violence--Islamic Empire--History.
Terrorism--Islamic Empire--History.
ʻUthmān ibn ʻAffān, Caliph, -656.
Harvard subject headings:
Assassination--Islamic Empire--History.
Islamic Empire--History--750-1258.
Political crimes and offenses--Islamic Empire.
Political violence--Islamic Empire.
Terrorism--Islamic Empire.
Princeton subject headings:
Assassination--Islamic Empire--History.
Islamic Empire--History.
Islamic Empire--Kings and rulers.
Political crimes and offenses--Islamic Empire--History.
Political violence--Islamic Empire--History.
Terrorism--Islamic Empire--History.
ʻUthmān ibn ʻAffān, Caliph, -656.