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John D. Kelson, Irene A. Manley, Harry R. Carter, Decline of the Marbled Murrelet in Clayoquot Sound, British Columbia: 1982-1993, Northwestern Naturalist, Vol. 76, No. 1, Symposium Issue: Biology of the Marbled Murrelet: Inland and at the Sea (Spring, 1995), pp. 90-98
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Kelson et al. (1995) studied this question.
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