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}
}