Putao District and Naga, Singpho tribes; Hun-Kawng Valley and Lakhimpur Frontier tract Central and Eastern Sections of North East Frontier Tracts of Assam and Burma, scale 1 inch to 4 miles 22 1/2" x 18 1/2"
Annotated Outline Grammar of the Singpho language, as spoken by the Singpho, Dowanniyas and others, residing in the neighbourhood of Sadiya, with illustrative sentences, phrasebook and vocabulary: J F Needham Dated as: Shillong 1889