Geographical distribution of the major Indo-Aryan languages (Urdu is not shown because it is mainly a lingua franca with no prevalence as a first language. Outside of the scope of the map is the migratory Romani language).
Nepali, E. and N. dialects of Bengali (Dacca, Maimansing, Rajshahi), dialects of Rajasthani (Lamani and NW. Marwari), Northern Lahnda's Kagani, Kumauni, many West Pahari dialects (not Chamba Mandeali, Jaunsari, or Sirmauri)
The following are consonant systems of major and representative New Indo-Aryan languages, as presented in Masica (1991:106–107), though here they are in IPA. Parentheses indicate those consonants found only in loanwords: square brackets indicate those with "very low functional load". The arrangement is roughly geographical.
John Beames, A comparative grammar of the modern Aryan languages of India: to wit, Hindi, Panjabi, Sindhi, Gujarati, Marathi, Oriya, and Bangali. Londinii: Trübner, 1872-1879. 3 vols.
Madhav Deshpande (1979). Sociolinguistic attitudes in India: An historical reconstruction. Ann Arbor: Karoma Publishers. ISBN 0-89720-007-1, ISBN 0-89720-008-X (pbk).
Chakrabarti,Byomkes (1994). A comparative study of Santali and Bengali. Calcutta: K.P. Bagchi & Co. ISBN 81-7074-128-9
Erdosy, George. (1995). The Indo-Aryans of ancient South Asia: Language, material culture and ethnicity. Berlin: Walter de Gruyter. ISBN 3-11-014447-6.
Kobayashi, Masato.; & George Cardona (2004). Historical phonology of old Indo-Aryan consonants. Tokyo: Research Institute for Languages and Cultures of Asia and Africa, Tokyo University of Foreign Studies. ISBN 4-87297-894-3.
Misra, Satya Swarup. (1980). Fresh light on Indo-European classification and chronology. Varanasi: Ashutosh Prakashan Sansthan.
Misra, Satya Swarup. (1991–1993). The Old-Indo-Aryan, a historical & comparative grammar (Vols. 1-2). Varanasi: Ashutosh Prakashan Sansthan.
Sen, Sukumar. (1995). Syntactic studies of Indo-Aryan languages. Tokyo: Institute for the Study of Languages and Foreign Cultures of Asia and Africa, Tokyo University of Foreign Studies.
Vacek, Jaroslav. (1976). The sibilants in Old Indo-Aryan: A contribution to the history of a linguistic area. Prague: Charles University.