Automatic telephones : an introductory treatise dealing with the fundamental principles methods, and advantages of automatic telephony with descriptions of apparatus circuits, and operation for students, telephone operators and others
by F. A. Ellson.
Bok Engelsk 1928
| Utgitt | London : Pitman , 1928
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|---|---|
| Omfang | XII, 215 s. : ill.
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| Emner |
