| 1 |  | Data communications for engineers / Michael Duck, Peter Bishop, Richard Read . - Harlow, England ; Reading, Mass. : Addison-Wesley Pub. Co., c1996. - xiii, 270 p. : ill. ; 24 cm.
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| 2 | | Data communications for engineers / Michael Duck, Peter Bishop, Richard Read . - Harlow, England ; Reading, Mass. : Addison-Wesley Pub. Co., 1996. - xiii, 270 p. : ill. ; 24 cm. |
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