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• 245 1_ |a Understanding modern telecommunications |c Dordick, Herbert S. |g |A UNDMOT |F DORDICK, HER

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• 260 __ |a London |b McGraw-Hill |c 1986.

• 300 __ |a c

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• 700 _0 |a Dordick, Herbert S. |A DORDICK, HER |4 著

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