Barnes, Carrie E., Ramraj Balaji, K. R. John, and Muthunarayanan Logaraj. 2018. “Comparison of One Versus Two Sputum Specimens in the Diagnosis of Pulmonary Tuberculosis”. International Journal Of Community Medicine And Public Health 5 (8):3191-96. https://doi.org/10.18203/2394-6040.ijcmph20183050.