@book{19943,
  address          = {Cape Town},
  author           = {Westphal, Ernst Oswald Johannes},
  pages            = {ii+32},
  publisher        = {A A Balkema for the University of Cape Town},
  series           = {Comm. from the School of African Studies},
  title            = {Vowel systems and x-ray photography: an assessment of the cardinal vowel chart},
  volume           = {36},
  year             = {1971},
  hhtype           = {phonology (computerized assignment from "vowel")},
  inlg             = {English [eng]},
  keywords         = {;saf;nmb;bts;rsa;lng;phn;bnt;s.41;w.100;y.211;y.242a;y.231;},
  lgcode           = {Xhosa [xho], Afrikaans [afr] (autotranslated from Maho's coding system)},
  macro_area       = {Africa},
  src              = {eballiso2009, weball},
  subject_headings = {saf, nmb, bts, rsa, lng, phn, w.100, bnt, s.41, y.211, y.241, y.231}
}