↑ Forth, Clive (2013). The Great British Mountain Bike Trail Guide. London: Bloomsbury Publishing Plc. p.2. ISBN9781408179444.
1 2 3 Huddart, David; Stott, Tim (2019). Outdoor Recreation: Environmental Impacts and Management. Cham, Switzerland: Palgrave Macmillan. p.180. ISBN978-3-319-97757-7.
↑ Forth, Clive (2013). The Great British Mountain Bike Trail Guide. London: Bloomsbury Publishing Plc. p.61. ISBN9781408179444.
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