Joshi, Y., G. Das, N. Maskey, J. Giri, and P. Himal. “A Study of Contacts In 500 Tubercular Families.”. Journal of Nepal Medical Association, Vol. 3, no. 2, Jan. 2003, pp. 111-9, http://www.jnma.com.np/jnma/index.php/jnma/article/view/954.