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Director telephone system (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Director telephone system" in English language version.

refsWebsite
Global rank English rank
2britishtelephones.com
low place
low place
1rhaworth.net
low place
low place
1telephonesuk.co.uk
low place
low place

britishtelephones.com

rhaworth.net

  • "A list of all the telephone exchanges in the London Director system circa 1968". Rhaworth.net. Retrieved 16 June 2016.

telephonesuk.co.uk