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8by Bingham, John A. C.Subjects “...Digital telephone systems....”
Published 2000
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9Published 1981Subjects “...Telephone switching systems, Electronic Congresses....”
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10Published 1978Subjects “...Telephone switching systems, Electronic Congresses....”
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18by Vallas, Steven P. (Steven Peter), 1951-Subjects “...American Telephone and Telegraph Company Employees....”
Published 1993
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