Severson, R.C., Tidball, R.R. (1979). Spatial variation in total element concentration in soil within the Northern Great Plains coal region. United States Geological Survey, Professional Paper 1134-A, p. A1-A18.
Some or all of the raw data associated with this publication have been loaded into the "Canadian Database of Geochemical Surveys" and subsequently converted into easy-to-use MS Excel spreadsheets. Follow the links in the "Survey Coverage" section below to determine exactly what data are available.
Soil sampling survey, North Dakota, South Dakota, Montana, Wyoming and southern Saskatchewan, 1974. (more)
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