▪ Hindu Tribes and Castes (1881) – Sherring
▪ Telugu Pariah Tribe (1899) – Emma
▪ Criminal Tribes (1905) – Barbara
▪ Todas (1906) – Rivers
▪ Nilgiri Todas, Kotars, Kadars, South Indian Castes and Tribes – Edgar Thurston
▪ Cochin Tribes and Castes (1909) – Ananthakrishna Iyer
