'Home Security Circular 320 (). Civilian Duty Respirators fitted with Microphone Attachments. Dec 6, 1939.' from His Majesty's Stationary Office (HMSO) Catalogue

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HMSO Catalogue

Book

Name	Home Security Circular 320 (). Civilian Duty Respirators fitted with Microphone Attachments. Dec 6, 1939.
Category	Air Raid Protections, Medical and Gas
Department	Ministry Of Home Security
Issued For	none
SO.Code	34-9999
Published	Dec/1939
Pages	unknown
Form	unknown
Size	unknown
ARJ	n/a

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