@book{Bangma-1992,
  address    = {Ljouwert},
  author     = {Bangma, Jelle},
  publisher  = {Afuk},
  title      = {Wolkom},
  year       = {1992},
  iso_code   = {fry},
  olac_field = {typology; semantics; syntax; general_linguistics},
  wals_code  = {frw}
}