Primary census abstract, Sikkim 2011 table A-5, A-8 and A-9
Census of India 2011 Sikkim series 12
Primary census abstract, Sikkim 2011 table A-5, A-8 and A-9 - Sikkim Director of census operations, Sikkim 2014 - cv, 136
Primary census abstract, Sikkim 2011 table A-5, A-8 and A-9 - Sikkim Director of census operations, Sikkim 2014 - cv, 136