@book{Duden-1998,
  address    = {Mannheim},
  author     = {Anonymous},
  editor     = {der Dudenredaktion, Wissenschaftlicher Rat},
  publisher  = {Duden-Verlag},
  series     = {Duden},
  title      = {Grammatik der deutschen Gegenwartssprache},
  volume     = {4},
  year       = {1998},
  iso_code   = {deu},
  olac_field = {typology; syntax; semantics; general_linguistics},
  wals_code  = {ger}
}