@misc{ZGraggen-1969,
  author     = {Z'graggen, John A.},
  school     = {Australian National University},
  title      = {Classificatory and typological studies in languages of the Madang district},
  year       = {1969},
  iso_code   = {kct; gyb; mlp; msy; bbd; mjk},
  olac_field = {general_linguistics; semantics; syntax; typology},
  wals_code  = {bau; mtk; mkr; mug; kai; grs}
}