A Study on Natural Radioactivity in Khewra Salt Mines, Pakistan Baloch, Muzahir Ali ; Qureshi, Aziz Ahmed ; Waheed, Abdul ; Ali, Muhammad ; Ali, Nawab ; Tufail, Muhammad ; Batool, Saima ; Akram, Muhammad ; Iftikhar, Poonam ; Qayyum, Hamza ; Manzoor, Shahid ; Khan, Hameed Ahmed Abstract Publication: Journal of Radiation Research Pub Date: 2012 DOI: 10.1269/jrr.11162 Bibcode: 2012JRadR..53..411B