@book{Houwald-1980,
  address    = {Managua, Nicaragua},
  author     = {Houwald, Götz von},
  publisher  = {Ministerio de Educación},
  title      = {Diccionario Español-Sumo, Sumo-Español},
  year       = {1980},
  iso_code   = {sum},
  olac_field = {syntax; general_linguistics; typology},
  wals_code  = {sum}
}