El-Naggar, Z. R. (1971). The genus Rugoglobigerina in the Maastrichtian Sharawna Shale of Egypt. In: Farinacci, A. (Editor), Proceedings of the II Planktonic Conference, Roma 1970. Edizioni Tecnoscienza, Rome. 421-476.
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El-Naggar, Z. R.
1971
The genus Rugoglobigerina in the Maastrichtian Sharawna Shale of Egypt. In: Farinacci, A. (Editor), Proceedings of the II Planktonic Conference, Roma 1970