books.google.co.in - An indispensable volume written by the director of Ethnology in India, Herbert Risley. It gives a very full and scholarly account concerning the people of India. Chapter one classifies the people according to their physical types; chapter 2 classifies them according to the social types; chapter three...http://books.google.co.in/books/about/The_People_Of_India.html?id=QA2OKK0-bdcC&q=Indo-Aryan+Jats&utm_source=gb-gplus-shareThe People Of India