M Afzal Uddin, PM Basak, Shahana Begum, M N Huda, Sandipan Ghose, MN Islam, M Moksedur Rahman, MMR Khan, M K Rahman, & M Tuhitur Rahman. (2015). A Study of Echocardiographic Changes Among the Patients of COPD. TAJ: Journal of Teachers Association, 28(1), 16-20. https://doi.org/10.70818/taj.2015.v028i01.050