J. A. Doolittle, M. A. Hardisky, M. F. Gross, A Ground-Penetrating Radar Study of Active Layer Thicknesses in Areas of Moist Sedge and Wet Sedge Tundra near Bethel, Alaska, U.S.A., Arctic and Alpine Research, Vol. 22, No. 2 (May, 1990), pp. 175-182
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Doolittle et al. (1990) studied this question.
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