"Newtondale"(PDF). sssi.naturalengland.org. Archived from the original(PDF) on 24 October 2012. Retrieved 24 March 2017.
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JQS 2015, p. 295. Evans, David; Bateman, Mark; Roberts, David; Medialdea, Alicia; Hayes, Laura; Duller, Geoff; Fabel, Derek; Clark, Chris (2015). Glacial Lake Pickering: stratigraphy and chronology of a proglacial lake dammed by the North Sea Lobe of the British–Irish Ice Sheet (Report). Journal of Quaternary Science. ISSN1040-6182.
JQS 2015, pp. 295–296. Evans, David; Bateman, Mark; Roberts, David; Medialdea, Alicia; Hayes, Laura; Duller, Geoff; Fabel, Derek; Clark, Chris (2015). Glacial Lake Pickering: stratigraphy and chronology of a proglacial lake dammed by the North Sea Lobe of the British–Irish Ice Sheet (Report). Journal of Quaternary Science. ISSN1040-6182.