TY  - RPRT
TI  - Assessment of geochemical variability and a listing of geochemical data for surface soils of eastern North Dakota and parts of northeastern South Dakota and northwestern Minnesota
AU  - R. C. Severson
AU  - S. A. Wilson
PY  - 1990
DO  - 10.3133/ofr90310
UR  - https://pubs.usgs.gov/publication/ofr90310
ID  - ofr90310
ER  -