Narayanagowda, D.S., Golia, S., Jaiswal, J. and Manasa, S.S. 2017. A bacteriological study of acute exacerbation of chronic obstructive pulmonary disease over a period of one year. International Journal of Research in Medical Sciences. 3, 11 (Jan. 2017), 3141–3146. DOI:https://doi.org/10.18203/2320-6012.ijrms20151152.