The time factor in telephone transmission / by O. B. Blackwell
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Superior document: | Bell telephone system B-619 |
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VerfasserIn: | |
Place / Publishing House: | New York, NY : Bell Telephone Laboratories, 1931 |
Year of Publication: | 1931 |
Language: | English |
Series: | Bell telephone system
B-619 |
Physical Description: | 18 S.; Ill., graph. Darst.; 23 cm |
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