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| 020 | _a81-318-0041-5 | ||
| 082 | 0 | 0 | _a621. 382 75 sar |
| 100 | 1 | _a"saraswathi, bala n. " | |
| 245 | 1 | 0 |
_aoptical communications: _b/ _c bala.n. saraswathi |
| 250 | _a2 ed. | ||
| 260 |
_anw delhi : _blaxmi publications _c2004. |
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| 300 |
_a"x, 207p.; _c24 cm." |
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| 504 | _a | ||
| 650 | 0 |
_a _x |
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_c42172 _d42172 |
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