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 Oc.tober 1933 with modifications Ref : (122) wt 33739 - p803 12M 5/36 Gp 389. EXTREMELY SCARCE

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

Published by The Post Office & HMSO London, 1936
Condition: Used - Very good Soft cover

Sold by Deightons, Bournemouth, United Kingdom

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Used - Soft cover

Condition: Used - Very good

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