Foreman, Velma. 1974. Grammar of Yessan-Mayo. (Language Data, Asian-Pacific Series, 4.) Ukarumpa, Papua New Guinea: Summer Institute of Linguistics.
@book{Foreman-1974, address = {Ukarumpa, Papua New Guinea}, author = {Foreman, Velma}, publisher = {Summer Institute of Linguistics}, series = {Language Data, Asian-Pacific Series}, title = {Grammar of Yessan-Mayo}, volume = {4}, year = {1974}, iso_code = {yss}, olac_field = {general_linguistics; syntax; typology; morphology; semantics}, wals_code = {yes} }