Phytosociological studies of biodiversity park derawar fort, cholistan desert, Bahawalpur, Pakistan Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Saeed Ahmad, Hafiz Muhammad Wariss, Khurshid Alam, Tanveer Hussain, Muhammad Luqman, Saleem Altaf Subject(s): Biological Sciences, Environmental Sciences, Biology