Principles of electricity applied to telephone and telegraph work : a training course text / prepared for employees of the Long lines Department, American Telephone and Telegraph Company.
|Corporate Author:||American Telephone and Telegraph Company.|
[New York, N.Y. : The Dept.], 1938 [i.e. 1941], c1939.
"November, 1938, (reprinted with corrections January, 1941)."
346 p.,  leaves of plates (2 folded) :
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