Marine Carrin, Harald Tambs-Lyche, "The Santals, though unable to plan for tomorrow, should be converted by Santals" in R. E. Frykenberg, A. M. Low, edd., Christians and Missionaries in India (Grand Rapids: Eerdmans, 2003. ISBN 978-0-8028-3956-5) pp. 274-294 (Paginae selectae apud Google Books)