विजयनुन्नी, एम॰ (26–29 अगस्त 1998). "Planning for the 2001 Census of India based on the 1991 Census"(PDF). 18th Population Census Conference. Honolulu, Hawaii, USA: Association of National Census and Statistics Directors of America, Asia, and the Pacific. मूल(पीडीऍफ़) से 19 नवम्बर 2008 को पुरालेखित. अभिगमन तिथि 13 अगस्त 2021.
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विजयनुन्नी, एम॰ (26–29 अगस्त 1998). "Planning for the 2001 Census of India based on the 1991 Census"(PDF). 18th Population Census Conference. Honolulu, Hawaii, USA: Association of National Census and Statistics Directors of America, Asia, and the Pacific. मूल(पीडीऍफ़) से 19 नवम्बर 2008 को पुरालेखित. अभिगमन तिथि 13 अगस्त 2021.
