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2. Pedological significance of lithologic discontinuities;Arnold,1968
3. A soil-geomorphic study in the Oregon Coast Range;Balster;Oregon State Univ. Agric. Exper. Sta. Tech. Bull.,1966
4. Geomagnetic variation during the late Pleistocene period and changes in the radiocarbon time cale;Barbetti;Nature,1979
5. Pedology, Weathering, and Geomorphological Research;Birkeland,1974