1. Tuberculosis in India- A National Sample Survey 1955–58. Special report series No. 34;New Delhi,1959
2. Epidemiology of pulmonary tuberculosis. Text book of pulmonary and critical care medicine- first edition. Jaypee Brothers Medical publishers;VK Chadha;New Delhi,2011
3. Central TB Division, Directorate General Health Services, Ministry of Health and Family Welfare, Government of India (2010) TB India 2010 - Revised National TB Control Programme Annual Status Report. Available at http://www.tbcindia.nic.in/pdfs/RNTCP TB India 2011.pdf. Accessed 2012 February 15.
4. The Annual risk of tuberculous infection in four defined zones of India - A comparative picture;VK Chadha;Int J Tuberc Lung Dis,2005
5. Annual risk of tuberculosis infection in North Zone of India;VK Chadha;Bull World Health Organ,2003