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↑ ^??? ^??? ^??? "About TfL ? What we do ? London Underground ? Facts & figures" . Transport for London . Retrieved 17 June 2014 .
↑ Transport for London, Windsor House, 42?50 Victoria Street, London SW1H 0TL, enquire@tfl.gov.uk. "TFL Annual Report and Statement of Accounts 2014/15" (PDF) . {{ cite web }}: line feed character in |title= at position 44 ( help ) ??????? ??????:??????? ?????:????? ????????? ( link )
↑ Transport for London, Windsor House, 42?50 Victoria Street, London SW1H 0TL, enquire@tfl.gov.uk. "Facts & figures" . {{ cite web }}: ??????? ??????:??????? ?????:????? ????????? ( link )
↑ Michael Goldfarb, Linda Wertheimer, Noah Adams. "London Underground Going Down the Tubes." NPR All Things Considered. 1998. HighBeam Research. (February 18, 2016). https://www.highbeam.com/doc/1P1-28843867.html ^{^{[
????? ????
]}} ? via Highbeam (??????? ???????)
↑ Connor, Piers (January 2013). "Deep tube transformation". Modern Railways . pp. 44?47.
↑ ?????????????? ?????????. ≪ Metro systems by annual passenger rides ≫. ?? ????????? ?????????? ??????? ? ??????????? ?? ?? ?? ????.
↑ "Making transport more accessible to all" . Department for Transport . 3 October 2012. Archived from the original on 17 September 2013 . Retrieved 17 March 2013 .

????? ?? ????? [ ?????? ]

???? ??? ? ??? ????

[Key_Facts-1] ??? ^??? ^??? "About TfL ? What we do ? London Underground ? Facts & figures" . Transport for London . Retrieved 17 June 2014 .

[TFL_Annual_Report_2014/15-2] Transport for London, Windsor House, 42?50 Victoria Street, London SW1H 0TL, enquire@tfl.gov.uk. "TFL Annual Report and Statement of Accounts 2014/15" (PDF) . {{ cite web }}: line feed character in |title= at position 44 ( help ) ??????? ??????:??????? ?????:????? ????????? ( link )

[TfL_Facts-3] Transport for London, Windsor House, 42?50 Victoria Street, London SW1H 0TL, enquire@tfl.gov.uk. "Facts & figures" . {{ cite web }}: ??????? ??????:??????? ?????:????? ????????? ( link )

[highbeamnpr-4] Michael Goldfarb, Linda Wertheimer, Noah Adams. "London Underground Going Down the Tubes." NPR All Things Considered. 1998. HighBeam Research. (February 18, 2016). https://www.highbeam.com/doc/1P1-28843867.html ^{^{[
????? ????
]}} ? via Highbeam (??????? ???????)

[Connor-5] Connor, Piers (January 2013). "Deep tube transformation". Modern Railways . pp. 44?47.

[6] ?????????????? ?????????. ≪ Metro systems by annual passenger rides ≫. ?? ????????? ?????????? ??????? ? ??????????? ?? ?? ?? ????.

[gov-7] "Making transport more accessible to all" . Department for Transport . 3 October 2012. Archived from the original on 17 September 2013 . Retrieved 17 March 2013 .

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