Neelamma, K. A. Sahana, and Dinesh Ragav E. 2021. “Clinical Profile and Bacteriological Eitiology in Cases of Acute Exacerbation of COPD in a Tertiary Care: A Tertiary Care Study”. International Journal of Advances in Medicine 8 (5):696-700. https://doi.org/10.18203/2349-3933.ijam20211478.