Purnell, Greg. 1987. Yis wordlist, Lumi sub-district, West Sepik Province. Ukarumpa: SILPNG Archives.
@misc{10103, author = {Purnell, Greg}, title = {Yis wordlist, Lumi sub-district, West Sepik Province. Ukarumpa: SILPNG Archives.}, year = {1987} }