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———. 1969. The Angami Nagas. Bombay: Oxford University Press (first published 1921 ).
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Johnstone, James.1971. Manipur and the Naga hills. Delhi: Vivek Publishing House.
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Kijungluba Ao.1972. Nokincheter mungchen. Gauhati : Christian Literature Centre.
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Mankekar, D.R.1967. On the slippery slopes of Nagaland. Bombay: Manaktalas.
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Prakesh Sinch.1972. Nagaland. New Delhi: National Book Trust.
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Thomas, M.M. and Taylor, R.1965. Tribal awakening. Social Concerns Series No. 11, Bangalore: Christian Institute for the Study of Religion and Society.