They had a false alarm problem in those days too
Subtitle: some highlights of the early history of the intruder alarmindustry.
Publisher: Security Gazette Ltd
Published: 1974
Place of publication: London
Language: eng
Number of pages: 377
Notes: An illustrated extract from Security gazette, vol. 16, no. 10, October 1974.

London firms in the 1920s and 1930s.