In the Linguistic Survey of India , linguist George Abraham Grierson analyzed various branches of languages in India .
In the Linguistic Survey of India , linguist George Abraham Grierson categorized various Naga languages into three groups : Western Naga , Eastern Naga , and Central Naga .
In the Linguistic Survey of India , linguist George Abraham Grierson analyzed various branches of languages in India and categorized various Naga languages into three groups : Western Naga , Eastern Naga , and Central Naga .