Ostapirat, Weera. 2000. Proto-Kra. Linguistics of the Tibeto-Burman Area 23(1). 1-251.
@misc{7094, author = {Ostapirat, Weera}, title = {Proto-Kra. Linguistics of the Tibeto-Burman Area 23(1). 1-251.}, year = {2000} }