Nakkady, S. E., and R. A. Eissa, 1960, Biostratigraphy and correlation of two Lower Cretaceous subsurface sections at Oyoun Mousa, Sinai, Journal of Geology of the United Arab Republic, Cairo 4(2): 1-18.
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Nakkady, S. E., and R. A. Eissa, 1960, Biostratigraphy and correlation of two Lower Cretaceous subsurface sections at Oyoun Mousa, Sinai, Journal of Geology of the United Arab Republic, Cairo 4(2): 1-18.