River Tay, United Kingdom(PDF) (Report). Peer-Euraqua network of hydrological observatories. Archived from the original(PDF) on 20 July 2011. Retrieved 29 December 2010.
River Tay, United Kingdom(PDF) (Report). Peer-Euraqua network of hydrological observatories. Archived from the original(PDF) on 20 July 2011. Retrieved 29 December 2010.