"MSF Radio Time Signal". National Physical Laboratory. Archived from the original on 2019-07-05. Retrieved 1 May 2022. General and technical information, advice on reception problems, and up-to-date information on signal outages and scheduled maintenance
"MSF 60 kHz Time and Date Code"(PDF). NPL Time and Frequency Services. National Physical Laboratory. July 2007. TAF001v06. Archived(PDF) from the original on 28 July 2008. Retrieved 26 May 2008.
"NPL Time Metrology". National Physical Laboratory, UK. Archived from the original on 27 June 2013. Retrieved 8 February 2012.
"MSF The Time from NPL"(PDF). National Physical Laboratory, UK. Archived from the original on October 31, 2007. Retrieved 6 April 2007.{{cite web}}: CS1 maint: unfit URL (link)
"What is NPL?". National Physical Laboratory. Archived from the original on 26 June 2015. Retrieved 9 October 2017.
"NPL T&F: FAQs". National Physical Laboratory, UK. Archived from the original on 6 June 2009. Retrieved 23 January 2008.
"MSF Radio Time Signal". National Physical Laboratory. Archived from the original on 2019-07-05. Retrieved 1 May 2022. General and technical information, advice on reception problems, and up-to-date information on signal outages and scheduled maintenance
"Time Has Moved". National Physical Laboratory, UK. Archived from the original on September 27, 2007. Retrieved 6 April 2007.{{cite web}}: CS1 maint: unfit URL (link)
"MSF 60 kHz Time and Date Code"(PDF). NPL Time and Frequency Services. National Physical Laboratory. July 2007. TAF001v06. Archived(PDF) from the original on 28 July 2008. Retrieved 26 May 2008.
worldcat.org
Thomas, Roger (July 2014). "MSF and the NPL". Radio User. Bournemouth UK: PW Publishing Ltd: 47–49. ISSN1748-8117.