a website devoted to the history of the Home Office Directorate of Telecommunications (DTELS) 1939 to 1994
INFORMATION1970; Extracts from Police Bulletins 13 and 15 relating to the DSL Resource Availability System (13) and Mobile UHF Repeater (15)COPYRIGHTThese extracts were taken from Home Office Police Research Bulletins published in January and July 1970 and are crown copyright.
page updated: 24/12/09
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