Voice Frequency Telegraphy System No 26 D Two articles : a lecture given on January 21 1935 to The Post Office Telephone And Telegraph Society + paper reproduced From The Post Office Electrical Engineers' Journal October 1933 with modifications Ref : (122) wt 33739 - p803 12M 5/36 Gp 389

Vernon, R J + Mercer, C J ( O.B.E., M.I.E.E. )

Edité par The Post Office & HMSO London, 1936
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1st edition + 1st edition thus ( two papers ). 4to. 34 + (2)pp. Bw photo frontis + 8 other bw plates. Publisher's cream soft card wrappers, green lettering + green illustration outline of UK within white circle + " No 26 D " on front. Two staple hinges through. Covers : hinges rusting with slight offsetting, faint dusty marks to front. Contents : very clean, tight & unfoxed. VG. N° de réf. du libraire 25131

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Détails bibliographiques

Titre : Voice Frequency Telegraphy System No 26 D ...

Éditeur : The Post Office & HMSO London

Date d'édition : 1936

Reliure : Soft cover

Edition : 1st Edition

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