000 | 00314nam a2200121Ia 4500 | ||
---|---|---|---|
008 | 220201s1970 xx 000 0 eng d | ||
041 | _aENG | ||
100 | _aATHINSON, J | ||
245 | 0 |
_aTELEPHONY _bDISCRETE AND INTEGRATED |
|
260 |
_aLONDON _bTHAMES AND HUDSON PUBLISHING COMPANY _c1970 |
||
300 | _a509 | ||
942 | _2ddc | ||
999 |
_c45154 _d45154 |