TY  - RPRT
TI  - A reconnaissance study of radon levels in soils developed on the Upper Cretaceous Pierre Shale just above the Sharon Springs Member in the Missouri River valley in southeastern South Dakota and northeastern Nebraska
AU  - K. A. Dickinson
PY  - 1992
DO  - 10.3133/ofr92592
UR  - https://pubs.usgs.gov/publication/ofr92592
ID  - ofr92592
ER  -