@unpublished{Rigden-nd-a,
  author     = {Rigden, Veda},
  note       = {Unpublished manuscript, Summer Institute of Linguistics},
  title      = {Karkar Grammar Essentials},
  type       = {manuscript},
  iso_code   = {yuj},
  olac_field = {general_linguistics; syntax; typology},
  wals_code  = {kyr}
}