Telephone communication with particular application to medium-frequency alternating currents and electromotive forces
| Prif Awdur: | |
|---|---|
| Awduron Eraill: | |
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
New York
McGraw-Hill
1925.
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| Pynciau: |