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1981
Severson, R. C., and L. P. Gough. Geochemical Variability of Natural Soils and Reclaimed Mine-Spoil Soils in the San Juan Basin, New Mexico In U. S. Geological Survey Professional Paper. Vol. 1134-C. Department of the Interior, 1981.
1976
Niem, Alan R., Jerry Simonson, Moyle E. Harward, Wendy A. Niem, Bob Tullock, and Jerry Kling. Geology and Soils Field Trip to Oregon Coast and Coast Range In 13th Annual Meeting of the Clay Minerals Society. Oregon State University, 1976.
1974
McMurphy, Carl J.. Soil Survey and Interpretation Report of Makah Indian Reservation., 1974.
1970
U.S. Geological Survey. Mercury in the Environment In U. S. Geological Survey Professional Paper. Vol. 713. Department of the Interior, 1970.
1955
Van Houten, Franklyn B.. "Inheritance Factor in Origin of Clay Minerals in Soil." Highway Research Board Bulletin, no. 108 (1955): 25-28.
1944
Twenhofel, W. H.. Soil: the Most Valuable Mineral Resource, its Origin, Destruction and Preservation In Department of Geology and Mineral Resources Bulletin. Vol. 26. Oregon Department of Geology and Mineral Industries, 1944.