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| 100 | 1 | _a"eastman, austin v. " | |
| 245 | 1 | 0 |
_afundamentals of cacuum tubes: _b/ _c austin.v. eastman |
| 250 | _a3 ed. | ||
| 260 |
_ausa : _bmcgraw-hill _c1949. |
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_a"xxi, 664p.; _c23 cm." |
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| 490 | 0 | _amcgraw-hill electrical and electronic engineering | |
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