Ballhatchet, Kenneth. Race, Sex and Class under the Raj: Imperial Attitudes and Politics and Their Critics, 1793-1905. Weidenfeld and Nicholson, 1980. https://catalog.ufv.ca/uhtbin/cgisirsi/x/0/0/57/5?searchdata1=256926{CKEY}&user_id=WEBSERVER, https://archive.org/details/racesexclassunde0000ball.