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Post Office Green Paper
General Post Office
(Publisher)
Post Office Green Paper No.25 - "Acoustics of Telephony". 17 pages with black and white photos and diagrams.
Collection Area
Industry
Item Number
91.46I/14
Historical Associations
Associated Person/Body: General Post Office
Association Type: Company name
Date: 1936
Creation/Production
Acquisition
collected officially, 11/9/1991
Measurements
Length
(mm): 244
Width
(mm): 185
Material
Paper
Metal
Location
In store
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