International records / UK National Archives

Voice frequency, speech plus Duplex No 2 apparatus: tropical testing

AVIA 45/60 | Ministry of Supply: Tropical Testing Establishment, Nigeria: Reports and Memoranda. Headquarters Reports. | Voice frequency, speech plus Duplex No 2 apparatus: tropical testing.

No file is held for this record yet. The catalogue entry and the link to where it was published are kept.

Source	UK National Archives
Collection	International records
Kind	Document
Publisher	The National Archives, Kew
Date	1946
Type	catalogue level 6, closure O
Details	series AVIA 45
Found at	https://discovery.nationalarchives.gov.uk/details/r/C486925
Archived copy	Look it up in the Wayback Machine
Record ID	`uk-tna-discovery:C486925`

Cite this record

Voice frequency, speech plus Duplex No 2 apparatus: tropical testing. UK National Archives, 1946. Vero Archive, record uk-tna-discovery:C486925.