Gupta, R., G. Purohit, and B. Choudhary. “Role of Flexible Fiberoptic Bronchoscopy in Diagnosis of Indefinate Pulmonary Infiltrates”. International Journal of Research in Medical Sciences, vol. 7, no. 5, Apr. 2019, pp. 1674-7, doi:10.18203/2320-6012.ijrms20191657.