India and Sikkim, 1814-1970 - Raghunadha Rao, P. (New Delhi Sterling Publishers, 1972)
"Revised and enlarged version of the thesis submitted by [the author] to the Indian School of International Studies, New Delhi in July 1968 ..."
Keywords: Sikkim (India) -- Relations -- India; India -- Relations -- Sikkim; Sikkim (India) -- History