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), pp. 3141–3146. doi: 10.18203/2320-6012.ijrms20151152.