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, November 1938 .
| مؤلف مشترك: | |
|---|---|
| التنسيق: | كتاب |
| اللغة: | English |
| منشور في: |
[New York]
s.n.
c1939.
|
| الموضوعات: |