‘’Biostratigraphy of Lower and Middle Subsurface Oligocene sediments, West Alexandaria, Egypt. – The Arab Petrol. Cong., No. 130(B- ‘’ Biostratigraphy of the subsurface Oligocene sediments in the North Western Desert, Egypt.- Qatar Univ. Sci.- Bull.(1984): 235-262 ‘’Biostratigraphic studies on the subsurface Paleogene rocks of the GPT well No. 7, Western Desert, Egypt.- Middle East Research, Center, Ain Shams Univ., 4-:189-215. ‘’ The Eocene- Oligocene boundary in some wells of the Western Desert; N. Jb. Palaont., Mh. 1985; h.1: 23-28 Stuttgart. ‘’ Geochemistry and Lithostratigraphy of the Eocene- Oligocene subsurface rocks in some wells of the Western Desert.- Delta Jour of Science, Tanta Univ, 9 : 143-166. ’Biostratigraphic studies on the Upper Cretaceous (Senonian rocks) of East Mubarak, Western Desert, Egypt.- Egypt. J. Geol., 30 : 159-172. Nannoplankton and palynological biostratigraphy of the early Cretaceous rocks of Monaga well no. 1, east of the Nile Delta Biostratigraphy of the subsurface Oligocene sediments in the North Western Desert, Egypt.-