Mammen, Ajoy, M Kasi, A Sundararajaperumal, and D Ranganathan. 2015. “Comparison of Two Spot Concentrated Sputum AFB Smear Versus Two Direct Sputum AFB Smears Done Regularly in Revised National Tuberculosis Control Programme”. Kerala Medical Journal 8 (4), 115-17. https://doi.org/10.52314/kmj.2015.v8i4.381.