Abdul Wahid To study the environmental pollutants caused by petrol vehicles in Quetta Pakistan : MPhil Physics Abdul Wahid - Islamabad: Allama Iqbal Open University, 2021. - xi,65p. HB Eng Standard No.: https://i.ibb.co/DcNFC41/Thesis-cover.png Subjects--Topical Terms: Dissertations, Academic--MPhil Physics Dewey Class. No.: 577.549 / WAT