BIBLIOGRAPHY CONTRIBUTOR Gurgis Awwad First name Gurgis Last name Awwad Bibliography entries by this contributor al-Sijzī, Abū. 1951. “Risāla Fī Maʿrifa Al-Khaṭṭayn Al-Mustaqīm Wa'l-Munhānī”. Ed. Gurgis Awwad. Sumer 7: 1-29.