sharashy, omar 2022. Application of Shannon and Simpson Diversity Index to Study Plant biodiversity on Coastal Rocky Ridges Habitats with Reference to Census Data in the Ras El-Hekma and Omayed Area on the Western Coastal Region of Egypt. Journal of Pure & Applied Sciences . 21, 1 (Feb. 2022), 41–45. DOI:https://doi.org/10.51984/jopas.v21i1.1578.