Thomas E. Hamer, Brian A. Cooper, C. John Ralph, Use of Radar to Study the Movements of Marbled Murrelets at Inland Sites, Northwestern Naturalist, Vol. 76, No. 1, Symposium Issue: Biology of the Marbled Murrelet: Inland and at the Sea (Spring, 1995), pp. 73-78
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Hamer et al. (1995) studied this question.
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