Catalogue description CIRCULAR LETTER concerning the use of pre-amplifiers with pen recorders.

This record is held by Museum of English Rural Life

Details of TR AMD/P2/B1353/3
Reference: TR AMD/P2/B1353/3
Title: CIRCULAR LETTER concerning the use of pre-amplifiers with pen recorders.
Description:

Pp 1.

Date: [1960s]
Held by: Museum of English Rural Life, not available at The National Archives
Language: English

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