Ethnologue gives the signing population in India as 2,680,000 in 2003.
Gordon, Raymond G. Jr. (ed.) (2005). Ethnologue: Languages of the World, Fifteenth edition. Dallas, Tex.: SIL International.Pemeliharaan CS1: Teks tambahan: authors list (link)
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, ed. (2023). "Isyarat India-Pakistan". Glottolog 4.8. Jena, Jerman: Max Planck Institute for the Science of Human History.Pemeliharaan CS1: Tampilkan editors (link)
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, ed. (2023). "Bahasa Isyarat India". Glottolog 4.8. Jena, Jerman: Max Planck Institute for the Science of Human History.Pemeliharaan CS1: Tampilkan editors (link)
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, ed. (2023). "Bahasa Isyarat Pakistan". Glottolog 4.8. Jena, Jerman: Max Planck Institute for the Science of Human History.Pemeliharaan CS1: Tampilkan editors (link)