000 00231 a2200073 4500
245 0 _aInternational Symposium on Human Factors in Telephony /
_c.
710 2 _aVDE Verlag.
_eWydawca
_4pbl
260 _aBerlin :
_bVDE Verlag,
_c1970.
300 _aVII, 520 s.;
_c35 cm.
999 _c6773
_d6773