Zahir, K.M. , Afreen, K.F. , Haque, M.O. , Rumi, M.A. and Khan, M.Z.I. 2021. Bacterial Colonization Pattern of Sputum in Patients Suffering From Acute Exacerbation of Chronic Obstructive Pulmonary Diseases. The Planet. 4, 01 (Sep. 2021), 8.