000 00318nam a2200121Ia 4500
008 211214s9999 xx 000 0 und d
040 _cJayakar Knowledge Resource Centre
100 _aPotter, Ralph K [et Al ...]
245 0 _aVisible speech
250 _a1st
260 _bD.Van Nostrand
_aNew York
_c1947
942 _c1
999 _c36170
_d36170