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H. G. Watkins, H. T. Morshead, R. v. d. R. Woolley, A. P. G. Michelmore, N. L. Falcon, C. T. Dalgety, The Cambridge Expedition to Edge Island, The Geographical Journal, Vol. 72, No. 2 (Aug., 1928), pp. 117-140
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Watkins et al. (1928) studied this question.
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