| 000 | 00371pam a2200157a 44500 | ||
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| 008 | 230515b1999 xxu||||| |||| 00| 0 eng d | ||
| 020 | _aNULL | ||
| 041 | _aENGLISH | ||
| 082 | _aN.D. | ||
| 100 | _aJ. LEBERSPACHAR | ||
| 245 | _aGSM SWITCHING SERVICS & PROTOCOLS | ||
| 250 | _a0 | ||
| 260 |
_aNULL _bA NEWNES TECHNICAL BOOK _c1999 |
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| 300 | _a274 | ||
| 650 | _aNULL | ||
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_c583581 _d583581 |
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