ʿĀrif, M. M. a., & Amstutz, C. (1983). Lead-zinc deposits along the Red Sea coast of Egypt: New observations and genetic models on the occurrences of Um Geigh, Wizr, Essel and Zug El Bohar. Borntraeger.
Chicago Style (17th ed.) CitationʿĀrif, Murtaḍā Murād al-, and Christian Amstutz. Lead-zinc Deposits Along the Red Sea Coast of Egypt: New Observations and Genetic Models on the Occurrences of Um Geigh, Wizr, Essel and Zug El Bohar. Berlin u.a: Borntraeger, 1983.
MLA (9th ed.) CitationʿĀrif, Murtaḍā Murād al-, and Christian Amstutz. Lead-zinc Deposits Along the Red Sea Coast of Egypt: New Observations and Genetic Models on the Occurrences of Um Geigh, Wizr, Essel and Zug El Bohar. Borntraeger, 1983.
Warning: These citations may not always be 100% accurate.