@book{Ball-1993,
  address    = {London / New York},
  author     = {Anonymous},
  editor     = {Ball, M. J.},
  publisher  = {Routledge},
  title      = {The Celtic Languages},
  year       = {1993},
  iso_code   = {cym},
  olac_field = {general_linguistics; typology; phonology; phonetics},
  wals_code  = {wel}
}