@article{Wolff-1959,
  author     = {Wolff, Hans},
  journal    = {Anthropological Linguistics},
  number     = {7},
  pages      = {1-88},
  title      = {Subsystem typologies and area linguistics},
  volume     = {1},
  year       = {1959},
  iso_code   = {bom},
  olac_field = {general_linguistics; phonology; phonetics; typology},
  wals_code  = {bir}
}