Text ( visual ) : unmediated Transmission systems for communications / members of the technical staff, Bell Telephone Laboratories. -- 5th ed.. -- [S.l.] : Bell Telephone Laboratories , 1982. -- xxi, 921 p. : ill. ; 24 cm. -- Includes bibliographical references and index. -- (BD03580558) ; https://ci.nii.ac.jp/ncid/BD03580558 Author Heading(s): Bell Telephone Laboratories, Inc.. -- Classification(s): LCC : TK6175. -- Subject Heading(s): LCSH : Telephone ; LCSH : Television -- Transmitters and transmission ; LCSH : Telecommunication systems

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