| 000 | 00341nas a2200121Ia 4500 | ||
|---|---|---|---|
| 008 | 170101s2017 xx 000 0 und d | ||
| 044 | _aU.S.A. | ||
| 245 | 0 | _aBELL System Technical Journal | |
| 260 |
_bAmerican Telephone and Telegraph _aNew York |
||
| 270 | _aAmerican Telephone and Telegraph | ||
| 362 | _aJan - Dec,1922 | ||
| 942 |
_2ddc _cP |
||
| 999 |
_c153931 _d153931 |
||