| 000 | 00514 a2200265 4500 | ||
|---|---|---|---|
| 001 | 134780 | ||
| 020 | _a1 | ||
| 041 | _aeng | ||
| 080 | _a621.391 Bac | ||
| 245 | _aData transmission | ||
| 250 | _a | ||
| 260 | _aLondon | ||
| 260 | _bMacdonald, | ||
| 260 | _c1973 | ||
| 300 | _a135 p. | ||
| 300 | _c21.5 cm | ||
| 490 | _aBSI 6161 : part - 12 : 1987 | ||
| 100 | _aBacon, M.D. | ||
| 700 | _aBull, G.M. | ||
| 700 | _a | ||
| 650 | _a | ||
| 650 | _aData transmission systems | ||
| 942 | _cBK | ||
| 942 | _2UDC | ||
| 999 |
_c133774 _d133774 |
||