Olson 1988

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 (unpublished).

@unpublished{Olson-1988,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}
}