field investigation [by] K. Rengma, Z. Nisa ; draft by N.C. Sen, D.C. Pathak, E. Peseyie ; cover design [by] J. Rai Baruah ; edited by N.C. SenController of Publications1989
investigation and draft A. K. Paul, P.D. Sharma ; guidance A.M. Kurup ; editing F. B. Lyngdoh, B.K. Roy BurmanOffice of the Registrar General, India, Ministry of Home Affairs1972