Hassan, Syed Hafeezul, Sikandar Ali Sheikh, and Farooq Munfeat. 2015. “SPIROMETRY AND VITAL PARAMETERS IN ASSESSMENT OF ASTHMA AND COPD IN RURAL POPULATION OF KARACHI”. Pakistan Journal of Chest Medicine 13 (1). https://www.pjcm.net/index.php/pjcm/article/view/188.