-凯发平台

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200|10|▼aat&t technical journal
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210|  |▼anew york, n.y.▼cat&t
300|  |▼a其他题名：at and t technical journal
430| 1|▼1011  ▼a0748-612x▼12001 ▼aat&-
   |  |t bell laboratories technical journal
517|1 |▼aat and t technical journal
530|0 |▼aat&t technical journal
531|  |▼aatt tech. j.
532|1 |▼aamerican telephone and teleg-
   |  |raph company journal
690|  |▼atn91
905|  |▼a801▼d/▼e▼f5