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Bewley, R.  (2010, May 27). St Joseph, (John) Kenneth Sinclair (1912–1994), geologist, archaeologist, and aerial photographer. Oxford Dictionary of National Biography. Retrieved 6 Aug. 2020, from https://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-55760.