US Directorate of Intelligence. "Country Comparison:Population". Archived from the original on 13 June 2007. Retrieved 1 October 2011. Guinea-Bissau 1,596,677 July 2011 est.
ethnologue.com
Eberhard, David M.; Simons, Gary F.; Fennig, Charles D., eds. (2019). "India – Languages". Ethnologue (22nd ed.). SIL International. Archived from the original on 1 April 2019. Singh, Sidheswar (2015). "Tharu". In Devy, Ganesh; Bhatt, Uma; Pathak, Shekhar (eds.). The Languages of Uttarakhand. People's Linguistic Survey of India. Vol. 30. Hyderabad: Orient Blackswan. pp. 163–76. ISBN9788125056263.
US Directorate of Intelligence. "Country Comparison:Population". Archived from the original on 13 June 2007. Retrieved 1 October 2011. Guinea-Bissau 1,596,677 July 2011 est.
Eberhard, David M.; Simons, Gary F.; Fennig, Charles D., eds. (2019). "India – Languages". Ethnologue (22nd ed.). SIL International. Archived from the original on 1 April 2019. Singh, Sidheswar (2015). "Tharu". In Devy, Ganesh; Bhatt, Uma; Pathak, Shekhar (eds.). The Languages of Uttarakhand. People's Linguistic Survey of India. Vol. 30. Hyderabad: Orient Blackswan. pp. 163–76. ISBN9788125056263.