@book{Ziervogel-1952,
  address    = {Johannesburg},
  author     = {Ziervogel, Dirk},
  publisher  = {Witwatersrand Press},
  title      = {A Grammar of Swazi},
  year       = {1952},
  iso_code   = {ssw},
  olac_field = {typology; semantics; general_linguistics; syntax},
  wals_code  = {swt}
}