BIBLIOGRAPHY CONTRIBUTOR H. Gibb First name H. Last name Gibb Bibliography entries by this contributor Rozenfeld, Boris, and H. Gibb. 2000. “ʿUmar Khayyām”. In Encyclopaedia of Islam, New Edition, 2ndnd ed., 10:827-34. Leiden: E. J. Brill. Samsó, Julio, and H. Gibb. 1960. “Māshāʾ allāh”. Encyclopaedia of Islam, New Edition. Leiden: E. J. Brill.
