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"50th Report of the Commissioner for Linguistic Minorities in India (July 2012 to June 2013)" (PDF). National Commission for Linguistic Minorities. 2014-07-16. Arkivita el la originalo (PDF) en 2018-01-02. [7] Konsultita la 22an de Marto 2018.
"The World Factbook — Central Intelligence Agency". www.cia.gov. [8]Arkivigite je 2019-05-14 per la retarkivo Wayback Machine Konsultita la 22an de Marto 2018.
"Bengali". UCLA Language Materials project. University of California, Los Angeles. Arkivita el la originalo la 15an de Julio 2007. Alirita la 20an de Novembro 2006.