| 000 | 00435nam a22001457a 4500 | ||
|---|---|---|---|
| 008 | 230221b |||||||| |||| 00| 0 eng d | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 080 |
_aR 621.39:681.3 _bM6 |
||
| 100 | _aDordick, Herbert S | ||
| 245 | _aUnderstanding modern telecommunications | ||
| 260 |
_aNew York: _bMcGraw Hill Book Company, _c1986 |
||
| 300 | _a324p. | ||
| 650 | _aScience | ||
| 942 |
_2udc _cBK |
||
| 999 |
_c46509 _d46509 |
||