Sharma, A. ., kumar , S. ., G, J. . and Singh, S. P. . (2016) “COMPARISON OF OXYGEN SATURATION PULMONARY FUNCTION AND QUALITY OF LIFE BETWEEN HILL AND PLAIN AMONG COPD PATIENTS”, International Journal of Physiotherapy, 3(3), pp. 346–350. doi: 10.15621/ijphy/2016/v3i3/100842.