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Payling, David (2012). Garratts and Kalaharis of the Welsh Highland Railway. Harbour Station, Porthmadog: Ffestiniog and Welsh Highland Railways. ISBN 978-0-901848-10-9. OCLC 871303225.
Payling, David (2012). Garratts and Kalaharis of the Welsh Highland Railway. Harbour Station, Porthmadog: Ffestiniog and Welsh Highland Railways. ISBN 978-0-901848-10-9. OCLC 871303225.