Metallic polar-duplex telegraph system for long small-gage...

Metallic polar-duplex telegraph system for long small-gage cables

Bell,, Shanck,, Branson,
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Volume:
44
Language:
english
Journal:
Journal of the A.I.E.E.
DOI:
10.1109/jaiee.1925.6536052
Date:
May, 1925
File:
PDF, 621 KB
english, 1925
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