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^Gribbon, Kieron (5 March 2012). Ireland's County High Points. Gill & Macmillan Ltd. ISBN 9781848899629 – via Google Books.
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^Muir, Jonny (15 January 2014). The UK's County Tops: Reaching the top of 91 historic counties. Cicerone Press Limited. ISBN 9781849659635 – via Google Books.