Element concentrations in soils and other surficial materials of Alaska [electronic resource] : an account of the concentrations of 43 chemical elements, ash, and pH in soil and other unconsolidated regolith samples / by L.P. Gough, R.C. Severson, and H.T. Shacklette.
[Washington, D.C.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1988.