1. Effect of depth and distances of subsoiling in the cotton crop on some deteriorated soils at northern Delta;Barakat;Megalet El-Felaha,1968
2. Soil Genesis and Classification;Buol,1973
3. Clay minerals studies of some Egyptian desert and Nile alluvial soils;El-Gabaly;J. Soil Science,1962
4. Identification and distribution of clay minerals in some sediments of the Nile Delta;Fayed;Int. J. Rock Mech. Min. Sci.,1970
5. Deep tillage and deep fertilization experiments on a clay pan soil;Ferinbocer,1958