Graham, J. (1991). The facts on file dictionary of telecomunications. Facts on File.
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Chicago-čujuhus (17. p.)
Graham, John. The Facts on File Dictionary of Telecomunications. New York: Facts on File, 1991.
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MLA-čujuhus (9. p.)
Graham, John. The Facts on File Dictionary of Telecomunications. Facts on File, 1991.
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