2023. NEW INSIGHT INTO THE MIDDLE EOCENE CALCAREOUS NANNOPLANKTON BIOSTRATIGRAPHY AND PALEOENVIRONMENT FROM FAYOUM AND BENI SUEF AREAS, EGYPT. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA . 129, 2 (May 2023). DOI:https://doi.org/10.54103/2039-4942/18930.