Appraisal of Occupational Health & Safety Management System in Oil & Gas Sector: A Case Study Of Qadirpur Gas Field Ghotki - Haris Jawad; Roll No. 08EE04; Prof. Dr. Saleem Raza Samo; Department Of Energy & Environment Engineering; Kashif Ali (Roll No. 08EE56); Fayaz Hussain (Roll No. 08EE05); Ashique Ali (Roll No. 08EE43) (Nawabshah QUEST, 2012)