Olson, Clif. 1988. Gumawana Grammar Essentials. (unpublished).
@unpublished{Olson-1988, author = {Olson, Clif}, title = {Gumawana Grammar Essentials}, type = {manuscript}, year = {1988}, iso_code = {gvs}, olac_field = {morphology; semantics; typology; general_linguistics; syntax}, wals_code = {gmw} }