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Signal Training Part II (Provisional) Inter-Communication (1920)
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| British Publication - Signal Training Part 2 (Provisional) Methods of Inter-Communication (Other Than Visual) Employed in Forward Areas. This example was Issued in November 1920 by the General Staff but printed in 1921. This book is an excellent reference and shows not only the electrical theory of the day but all the telephone/telegraph equipment that would be used in forward areas. |
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