Economic tables. Nagaland. V. 18, Pt.IIIB-B series, Table B-2(f), B-3(f), B-6(f), B-7(f), B-8(f), B-9(f), B-12(f), B-13(I)(f), B-13(II)(f), B-14(f), B-15(I)(f), B-15(II)(f), B-16(f), B-17(f), B-18(f) - Census of India, 1991 (Nagaland Govt. Press, 1991)