Sutton, Allan. "The Leeds & Catlin Story". Mainspring Press (archived). Mainspring Press. Archived from the original on 8 August 2007. Retrieved 5 December 2017.
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Sutton, Allan. "The Leeds & Catlin Story". Mainspring Press (archived). Mainspring Press. Archived from the original on 8 August 2007. Retrieved 5 December 2017.