| 000 | 00428nam a2200157Ia 4500 | ||
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| 008 | 240618s9999||||xx |||||||||||||| ||und|| | ||
| 020 | _aERNET | ||
| 040 | _aMAIN | ||
| 082 | _a335 | ||
| 100 |
_aCCITT, CCITT, CCITT _934690 |
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| 245 | 0 | _aBLUE BOOK,VOLUME III,FASCICLE III.4: GENERAL ASPECTS OF DIGITAL TRANSMISSION SYSTEMS;TERMINAL EQUIPME | |
| 260 |
_bITU _c1989 _aGENEVA |
||
| 300 | _b614 | ||
| 500 | _aSC-021 | ||
| 942 | _cBK | ||
| 999 |
_c41636 _d41636 |
||