Tidball, R.R., Severson, R.C. (1974). Geochemical reconnaissance of soils in the Northern Great Plains coal province. In Geochemical Survey of the Western Coal Regions, Second Annual Progress Report, July 1975. United States Geological Survey, Open-File Report 75-436, p. 36-49.
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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